Enthalpy of Reaction and Hess’s Law Essay

I. Purpose The purpose of this lab is to verify Hess’s Law through the three reactions of NaOH and HCl, NH4Cl and NaOH, and NH3 and HCl. The sum of the enthalpies of the first two reactions should equal the enthalpy of the third reaction. II. Background Hess’s Law is used to determine the enthalpy of a reaction from adding two or more preceding reactions. To determine the enthalpies of certain chemical reactions, the change in must be measured. This is best done using a calorimeter to prevent heat loss to the surroundings. To calculate the heat change in solution, the q=mct equation must be used. A positive value for â€Å"q† means the solution gains heat, a negative value means the solution loses heat and is exothermic. The reactions used in the lab are exothermic acid-base neutralizations. By calculating â€Å"q†, heat, the enthalpy of reaction can be found by knowing the Molarity of the reactants. The specific heat of the calorimeter can be found by the equation qcal= t x heat capacity. Since a calorimeter is used the heat released from the reaction will be absorbed in the solution, while some heat is transferred to the calorimeter. So the â€Å"q† of the reaction is given by this equation: qrxn= †“ (qsol+qcal). III. Summary of Procedure Part 1: A calorimeter is to be arranged using Styrofoam cups and a hole on top of a cover to take the temperature while also preventing heat loss. 50mls of distilled is to be added to the calorimeter. 75mls must then be heated to 70 degrees Celsius and 50mls of that water is to be added to the calorimeter. The calorimeter has to be covered and then the temperature taken every 20 seconds for 3 minutes. Part 2: 50mls of 2.0M HCl must be put into the calorimeter. A 50mls solution of 2.0M NaOH should then be added to the HCl solution and stirred. The temperature needs to be recorded every 20 seconds for 3 minutes. For the second reaction the same process has to be repeated using 2.0M NH4Cl and 2.0M NaOH. The third reaction requires the same process using 2.0M solutions of NH3 and HCl. IV. Observations * Styrofoam cup becoming hot after mixture * thermometer scraping the Styrofoam cup sides * cover doesn’t completely cover the cup * small amount of time between pouring the chemicals and covering and mixing VI. Results and Questions Calculations please see attached graphs and work. Post Lab Questions 1. What is meant by calorimetry? Calorimetry is the scientific measuring of heat released during chemical and physical changes. It ensures that minimal heat is lost so the heat of reaction can be found accurately. 2. How does graphical analysis improve the accuracy of the data? Once the points are plotted on a graph the line of best fit can be drawn and extrapolated toward the y-axis. Since the first data plots can be inconsistent the best fit line may ignore the first points making the data more accurate by disregarding the inaccurate data. 3. What is the meaning of the negative sign in front of the equation for heat of reaction? The negative sign in front of the brackets indicate that we are in fact solving for the reverse reaction. So the sign must have a negative to indicate the reaction that is the forward, exothermic, reaction. 4. Do the lab results support Hess’s Law? The lab does support Hess’s Law. The percent error is relatively small for this lab and algebraically it is proven that the sum of the enthalpies of the first two reactions is close the measured value of the third reaction. 5. How could the procedure be modified to achieve greater accuracy? To improve the accuracy of the lab a formal capacitor could be used instead of average Styrofoam cups. An airtight seal between the cover and thermometer would also be more accurate by preventing heat loss to the surroundings. 6. Find a table reference that lists standard heat of formation for the species included in your net ionic equations. Use them to calculate delta H for the reaction of the net ionic equations. Do these values support Hess’s Law? See attached calculations. VII. Conclusion This lab successfully verified Hess’s Law by adding enthalpies of reactions to equal the enthalpy of a third reaction. The mix of NaOH with HCl, and NH4 with NaOH proved to give off a heat close to that of NH3 mixed with HCl. The percent error proved to be 3.72%. The sources of error could be the heat lost while the calorimeter was not covered and maybe not enough mixing throughout the duration of the three minutes. The addition of a mixing unit and an airtight seal on the capacitors would provide an improved version of this lab.

Reflection Summary Essay

The previous week’s objectives covered PowerPoint in Microsoft Office, Presentation Tools, and System Development Life Cycle (SDLC). What could be applicable to your workplace or personal, and how your knowledge has increased as a result of what you experienced through the learning activities. We learned about presentation tools that are available in the marketplace and their advantages and disadvantages that they may have. Our team agreed that Microsoft Power Point is the most common and most used in the workplace and market place. We were all very familiar with how the system works, we all have worked with Power Point before. We were all very comfortable with Microsoft Power Point. There are many other presentation tools that can be used, and that are available but overall the most common is Microsoft Power Point. The next topic we had discussed was about what business go through to implement new technology. The second discussion question posted we learned was in regards to six stages of the systems development life cycle. The system development life cycle (SDLC) has six processes in which information system is process: systems investigation, system analysis, systems design, programming and testing, implementation, and operation and maintenance. These six processes are important for organizations to use when deciding on an information system; however, these processes are not only for organization, but also for personal use as well. When deciding whether to get a new operation system for a personal computer, you can have some of the same challenges. Consumers have to decide what kind of budget they have, what will the system do for them, and will the system last for a long time before having to get another system. We didn’t realize what business have to go through to implement new technology into the business plan. We learned that it can be a very long, in depth and costly process to implement a new system in the work place. In conclusion, we have learned many great things as a team about Microsoft power point, and presentation. How everyone uses power point for work and personal life. We also learned about System Development Life Cycle (SDLC). How the process can be long and expensive depending on the system  requirements. We agreed and disagreed on many things but in the end we were able to learn from one another. Working as team has made it better and easier to learn, we each collaborated on putting this reflection summary together. It has made it an even better learning experience working together as a team.

Expanding Nation Essay

In the 1830’s and 40’s the westward movement of population left the valley of the Mississippi behind and penetrated the Far West all the way to the Pacific. Pioneers pursued fertile land and economic opportunity beyond the existing boundaries of the United States and thus helped set the stage for the annexations and international crises of the 1840’s. Some went for material gain, others for adventure, and a significant minority sought freedom from religious persecution. But whatever their reasons for migrating, they brought American attitudes and loyalties into regions that were already occupied or at least claimed by Mexico or Great Britain. Whether they realized it or not, these pioneers were the vanguard of American expansionism. The domestic controversies aroused by the Mexican War and the propaganda of Manifest Destiny revealed the limits of the mid-nineteenth century American expansionism and put a damper on additional efforts to extend the nation’s boundaries. Concerns about slavery and race impeded acquisition of new territory in Latin America and the Caribbean. Resolution of the Oregon dispute clearly indicated that the United States was not willing to go to war with a powerful adversary to obtain large chunks of British North America, and the old ambition of incorporating Canada rapidly faded. After 1848, American growth usually took the form of populating and developing the vast territory already acquired. The expansionists of the 1840’s saw a clear link between acquisition of new territory and other forms of material growth and development. In 1844 Samuel F. B. Morse perfected and demonstrated his electric telegraph, a device that would make it possible to communicate rapidly over the expanse of a continental nation. Simultaneous, the railroad was becoming increasingly important as a means of moving people and goods over the same great distances. Improvements in manufacturing and agricultural methods led to an upsurge in the volume and range of internal trade, and the beginnings of mass immigration were providing human resources for the exploitation of new areas and economic opportunities. After gold was discovered in newly acquired California in 1848, a flood of emigrants from the East and several foreign nations arrived by ship or wagon train, their appetites whetted by the thoughts of striking it rich. The gold they unearthed spurred the national economy, and the rapid growth of population centers on the Pacific Coast inspired projects for transcontinental telegraph lines and railroad tracks. When the spirit of Manifest Destiny and the thirst for acquiring new territory waned after the Mexican War, the expansionist impulse turned inward. The technological advances and population increased of the 1840’s continued during the 50’s. The result was an acceleration of economic growth, a substantial increase in industrialization and urbanization, and the emergence of a new working class (Billington, 1956). The first movement west aimed not for the nearby plains but for California and Oregon on the continent’s far shore. It started in the 1849 Gold Rush to California and in the next three decades perhaps as many as half a million individuals made the long journey. Some walked; others rode horses alone or in small groups. About half jointed great caravans, numbering 150 wagons or more, that inched across the 2000 miles between the Missouri River and the Pacific Coast. More often than not men made the decision to make the crossing. Wives either went with their husbands or faced being left behind. Four out of five men on the overland trail had picked up stakes and moved before, some of them several times. People moved west for many reasons. Some sought adventure; others wanted to escape the drab routine of factory or city life. Many moved to California for their health. What ever the specific reasons most people moved west to better their lot. On the whole their timing was good, for as a nations population grew, so did the demand for the livestock and the agricultural mineral and lumber products of the expanding West. Opposite to older historical views the West did not act as a major safety valve or an outlet for social and economic tensions. The poor and unemployed did not have the means to move there and establish farms. Most people moved West in good times, in periods of rising prices, of expanding demand, when the prospects for making money from this new land looked brightest; and this aspect characterized the whole pattern of settlement and greatly improved the whole of the economic growth for the U. S. In the last three decades of the nineteenth century a flood of settlers ventured into America’s newest and last west (Jones, 1960). The West became a great colonial empire, harnessed to eastern capital and tied increasingly to national and international markets. Western economies depended to an unusual degree on the federal government, which subsidized their railroads, distributed their land, and spent millions of dollars for the upkeep of soldiers and Indians. Regional variations persisted and Westerners remained proud of their hardy, individualistic traditions. Yet they imitated the East’s social, cultural, and political patterns. By the 1890’s the West of the buffalo and Indian was gone, and instead there were cities and towns, health resorts, Paris fashion and the latest magazines. The frontier line had reached the edge of the timber country of Missouri by 1840. Beyond lay an enormous land of rolling prairies, parched deserts, and rugged, majestic mountains. Emerging from the timber country, travelers first encountered the Great Plains. These lands were treeless, nearly flat, and an endless sea of grassy hillocks. The Prairie Plains, the eastern part of the region, enjoyed rich soil and good rainfall; it included parts of present day Wisconsin, Minnesota, the Dakotas, Nebraska, Kansas, Oklahoma, and Texas. To the west covering Montana, Wyoming, Colorado, New Mexico and Arizona were called the High Plains. They were rough, semiarid, rising gently to the foothills of the Rocky Mountains (Faragher, 1979). The original incentive to mechanize northern industry and agriculture came in part from a shortage of cheap labor. Compared with the industrializing nations of Europe, the United States of the early nineteenth century was a labor-scarce economy. Since it was difficult to attract able-bodied men to work for low wages in factories or on farms, women and children were used extensively in the early textile mills, and commercial farmers had to rely heavily on the labor of their family members. In the face of such limited and uncertain labor supplies, producers were greatly tempered to experiment with labor saving machinery. By the 1840’s and 50’s industrialization had reached a point where it could readily absorb a new influx of unskilled workers. Factories required increasing numbers of unskilled operatives, and railroad builders needed construction gangs. The growth of industrial work opportunities helped attract a multitude of European immigrants during the two decades before the Civil War (Fishlow, 1965). Between 1820 and 1840 an estimated 700,000 immigrants arrived in the United States, mainly from the British Isles and German-speaking areas of continental Europe. During the 1840’s this substantial flow suddenly became a flood. No less than 4,200,000 crossed the Atlantic between 1840 and 1860, and about 3 million of these arrived in the single decade between 1845 and 1855. This was the greatest influx in proportion to total population that the nation has ever experienced. The largest single source of the new mass immigration was Ireland, but Germany was not far behind. This massive transatlantic movement had many causes; some people were pushed out of their homes, while others were pulled toward America. The great push factor that caused a million and a half Irish to forsake the Emerald Isle was the great potato famine. Escape to America was made possible by the low fares then prevailing on sailing ships bound from England to North America. The million or so Germans who also came in the late 1840’s and early 50’s were somewhat more fortunate. Most of them were also peasants, but they fled hard times rather than outright catastrophe. What attracted or pulled most of the Irish, German and other European immigrants to America, was the promise of economic opportunity (Jones, 1992). By 1860 industrial expansion and immigration had created a working class of men and women who seemed destined for a life of low paid wage labor. This reality stood in contrast to America’s self image as a land of opportunity and upward mobility. Wage labor was popularly viewed as a temporary condition from which workers were supposed to extricate themselves by hard work and frugality. According to Abraham Lincoln in 1850 of the North’s free labor society, â€Å"there is no such thing as a freeman being fatally fixed for life, in the condition of a hired laborer. This ideal still had some validity in rapidly developing regions of the western states, but it was mostly myth when applied to the increasingly foreign born industrial workers of the Northeast. Both internal and external expansion had come at a heavy cost. Tensions associated with class and ethnic rivalries were only one part of the price of rapid economic development. The acquisitions of new territories became politically divisive and would soon lead to a catastrophic sectional controversy. From the late 1840’s to the Civil War, the United States was a divided society in more than one sense, and the need to control or resolve these conflicts presented politicians and statesmen with a monumental challenge (Gutman, 1976). Many have searched for the underlying causes of the crisis leading to the disruption of the Union but have failed to agree on exactly what they were. Some have stressed the clash of economic interests between agrarian and industrializing regions. But this interpretation does not reflect the way people at the time expressed their concerns. The main issues in the sectional debates of the 1850’s were whether slavery was right or wrong and whether it should be extended or contained. Disagreements over protective tariffs and other economic measures allegedly benefiting one section or the other were clearly secondary. It has never been clear why the interests of northern industry and those of the South’s commercial agriculture were irreconcilable. From a purely economic point of view, there was no necessity for producers of raw materials to go to war with those who marketed or produced them. The critical period of Civil War diplomacy was in 1861 to 1862 when the South was making every effort to induce foreign powers to recognize its independence and break the Union blockade. The hope that England and France could be persuaded to involve themselves in the war on the Confederate side stemmed from the fact that these nations depended on the South for three quarters of their cotton supply. In the case of Britain, the uninterrupted production of cotton textile appeared essential to economic prosperity (Stampp, 1950).

The Important Career Development on organization Research Paper

The Important Career Development on organization - Research Paper Example Individuals should take career development process seriously in order to progress professionally. Moreover, organizations should also consider it important to practice this process to bring out the best from their employees. (Iretire, 2011) illustrate that career development as a ladder towards success which helps every individual achieve his or her objective by following various steps. This process provides guidance to an individual since the start of his/her career beginning right from choosing the right educational institution, subject to organization. The Career Planning covers areas like choosing of an occupation, getting a job, growing in your job, achieving the desiired growth and eventually retiring. (Gutteridge 1986) argue that Career development is one of an integral component of human resource (HR) management in a workplace. Other components consist of company’s design, control, HR planning and evaluation. ... Moreover, employees today are very much concerned about their career than before. As the economy is growing, workers demands are also increasing both in terms of progress and personal growth. Organizations and companies that are not able to meet these needs and demands of their workers face increased employee turnover. Therefore, this research paper will discuss the importance of career development in an organization as it not only helps retain employees but also benefits employees by allowing them to fulfill their career related wants and needs. Various companies today are facing one common problem, i.e. employee retention. They are aware of the fact that replacing employees is a lot more expensive than retaining existing ones. Hiring new employees includes high cost of recruiting and training. High employee turnover not only effects the organization in terms of high cost but also have a negative effect on its effectiveness and efficiency. The most effected organizations are service oriented ones including firefighters and law-enforcement agencies that require highly trained, skilled and competent workforce. Many studies have been conducted to best address this problem and results have shown that career development programs can resolve this issue to a certain extent. Earlier, it was assumed that employee need a straight path to move up the ladder, (Werther & Davis, 1992) cite Career development is not just about moving ahead but is about achieving what is best for his/her career and suits his/her expertise. This will also enable employee to contribute positively in achieving company’s goal and objective. Implementing career development

Feasibility study Research Paper Example | Topics and Well Written Essays - 2000 words

Feasibility study - Research Paper Example The new business venture will be called Pizzeria Inn. It will be located at the northern Mexico. The new industry will, therefore, feature Dine in, Take Out and also Delivery services. Most economists and researchers agree that entrepreneurship is one of the significant ingredients for stimulating economic growth as well as offering job opportunities to the jobless members of all the societies. According to Jacksack & Start (2003), globally, successful SMEs have become the primary engines of job creation and poverty reduction in the marginalized communities. As a business entrepreneur, a business plan is the only tool which can help the small business expand. It is the road map an entrepreneur needs to follow in order to realize the set goals and objectives. It is, therefore, the initial step to a successful business venture. Any business entrepreneur should, therefore, provide a business plan which acts as a guide to the whole business process. The paper, therefore, endeavors to conduct a business plan for New Antoniou Pizzeria. The new business venture will target the middle income pizza in Sparks. Pizza inn is thought to be conveniently accessible to over 90,000 targeted market consumers in this region. This includes one of the most attractive market opportunities for this venture. The competitive analysis of the business venture has identified significant market place gaps to serve as the base for the industries competitive advantage. This business venture would help Mexican middle class residents around the beach as well as far residents who come to the beach to benefit from low priced delicious dishes which maybe could not have afforded from other huge restaurants. It would also help other entrepreneurs to venture in innovative business ventures hence gain the managerial and entrepreneurial skills needed to run such

Directors Confidential Board Meeting Assignment

Directors Confidential Board Meeting - Assignment Example All business services required access to internet, secretary services, copying, phones and fax. Breakfast and lunch to be arranged .Inform the complete day schedule of the guests to be ready with additional necessary arrangements. Morning refreshments to be provided after the arrival of guests at 8 am. A three course working lunch to be arranged at 1 pm. Afternoon refreshments to be provided during high tea. Complete the task by October 20. Transport to be arranged from Canary Wharf to London airport the next day. Pick up from Canary Wharf square mile at 7 am. Individual Limousines to be arranged for clients. In total 8 cars to be booked. Complete task by October 27. .. Contact Town car and limo service Inc (2) to save time for the booking. Guests to be dropped back to Canary wharf after dinner. 10 Individual costs for dinner not to exceed 150. Hence contact the Hotel Hilton facility manager to discuss on the facilities again (Food menu & dinner area).Complete task by October 25. 11 Transport to be arranged from Canary Wharf to London airport the next day. Pick up from Canary Wharf square mile at 7 am. Individual Limousines to be arranged for clients. In total 8 cars to be booked. Complete task by October 27. 12 Take down contact details of the Facility managers, Drivers and other support facilitators for any immediate changes/arrangements. Complete task by October 28. 13 Discuss on the plan with team members internally again and ask for suggestions/opinions for any betterment/change in the plan. Complete task by October 29. 14 Inform the client about the plan and ask if there are any changes necessary required in the plan. Complete task for October 30. (2)Event function sheet Time Agenda 7:00 AM Guests to be picked up from Canary Wharf - Square circle. 7:45 AM Guests to reach Hotel Marriott West India Quay 8:00 AM Welcoming guests at the Hotel reception 8:15 AM Breakfast 9:00 AM Message by the Head - Executive director. 9:30 AM Message by Second in command on the strengths of the company 10:15 AM Message by Third in command on the strengths of the competitor company. 11:00 AM Tea break 11:15 AM Overview of the current business scenario by a Senior executive 12:00 PM Discussion on Merger and Acquisition. 1:00 PM Lunch 1:45 PM Business prospects after the take over of the competitor company. 3:30 PM High tea 3:45 PM Discussion on Improvising on Business segments 4:30 PM A

Globalization Transforms a Planet into a Flat World Coursework

Globalization Transforms a Planet into a Flat World - Coursework Example Thomas Friedman indicates that the world has now become flat and recommends that people embrace the changes as fast as they can. He also says that the globalization might not be in its finale but it is just on its early stages towards more developments. Friedman indicates in amazement that people might find themselves in his situation if action is not taken to be at par with the developments taking place in the world. Friedman (2005) indicates that he found himself ‘behind’ new technology at the time of conducting his research.New technologies had come up at the time of his research, and Friedman could not believe how people were in a position to hold meetings with people all over the world without their physical presence. In short, Friedman meant to say that new technologies are coming up, and it is a high time people get ready to embrace the new changes. He claims that other parts of the world have already embraced change, and are on the verge of restructuring their sy stems to welcome many more that may knock their doors.In Abowitz and Roberts (2007) work, it is justified to argue that technology is one of the many reasons that led to Friedman indication that the world may be leveled. Pollack (2005) argues that among the most important forms of technology is outsourcing. Over the years, many countries have been on the run to acquire millions and billions of shillings to invest in the technological sector. All forms of technological advancement were welcome by all states no matter how minute, so long as they proved their ability to move the country an inch further towards technological advancement. With this taking place, Brakman and Marrewijk (2007) argue that it became easier for the world, not only to store data but also to access to all undertakings in the world. As a result, computers became extremely cheap with more producers venturing into this market.