Example Problem of Enthalpy Change of a Reaction

This example problem shows how to find the enthalpy for the decomposition of hydrogen peroxide. Enthalpy Review You may wish to review the Laws of Thermochemistry and Endothermic and Exothermic Reactions before you begin. Enthalpy is a thermodynamic property that is the sum of the internal energy that is added to a system and the product of its pressure and volume. Its a measure of the systems capacity to release heat and perform non-mechanical work. In equations, enthalpy is denoted by the capital letter H, while specific enthalpy is lowercase h. Its units are usually joules, calories, or BTUs. The change in enthalpy is directly proportional to the number of reactants and products, so you work this type of problem using the change in enthalpy for the reaction or by calculating it from the heats of formation of the reactants and products and then multiplying this value times the actual quantity (in moles) of material that is present. Enthalpy Problem Hydrogen peroxide decomposes according to the following thermochemical reaction:H2O2(l) → H2O(l) 1/2 O2(g); ΔH -98.2 kJCalculate the change in enthalpy, ΔH, when 1.00 g of hydrogen peroxide decomposes. Solution This sort of problem is solved by using a table to look up the change in enthalpy  unless its given to you (as it is here).  The thermochemical equation tells us that ΔH  Ã¢â‚¬â€¹for the decomposition of 1 mole of H2O2 is -98.2 kJ, so this relationship can be used as a conversion factor. Once you know the change in enthalpy, you need to know the number of moles of the relevant compound to calculate the answer.  Using the Periodic Table  to add up the masses of hydrogen and oxygen atoms in hydrogen peroxide, you find  the molecular mass of H2O2 is 34.0 (2 x 1 for hydrogen 2 x 16 for oxygen), which means that 1 mol H2O2 34.0 g H2O2. Using these values: ΔH 1.00 g H2O2 x 1 mol H2O2 / 34.0 g H2O2 x -98.2 kJ / 1 mol H2O2ΔH -2.89 kJ Answer The change in enthalpy, ΔH, when 1.00 g of hydrogen peroxide decomposes -2.89 kJ Its a good idea to check your work to make sure the conversion factors all cancel out to leave you with an answer in energy units. The most common error made in the calculation is accidentally switching the numerator and denominator of a conversion factor. The other pitfall is significant figures. In this problem, the change in enthalpy and mass of sample both were given using 3 significant figures, so the answer should be reported using the same number of digits.

Understanding Emotional Intelligence ( Ei ) - 1943 Words

Today they define Emotional Intelligence (EI) as â€Å"the ability to identify and manage your own emotions and the emotions of others.†(Psychology Today, 2014) It is an aspect or characteristic that is essential in understanding ones emotional ability to monitor and be aware of their personal emotions as well as others, but to also be able to decipher different types of emotions and be able to apply those emotions to different types of behavior appropriately. Throughout history and research it has been proven that this skill has been tested in order to validate someone for different positions such as leadership performance or even job performance. This type of models that are used to assess EI being; ‘The Mix Methods Model’ and the†¦show more content†¦Interpersonal abilities include awareness of others’ emotions, feelings, and needs, as well as the ability to establish and maintain cooperative, constructive, and mutually satisfying relationships. (EQ-i:S, 2014). Theoretical Orientation Theoretical orientation is the guiding principle in organizing a treatment and it provides information (Kolmes, 2009). The theo ries give different understandings into all aspects of psychology such as counselling, assessing people, test development, research, and teaching. It is the theory a psychologist bases their practice and develops their research on (Kolmes, 2009). The two emotional intelligence tests, the MSCEIT and the EQ-I, have different theoretical orientations. Reasons for this are that the developers of each test would have different orientations to which they would apply to their test. Emotional intelligence is defined as the ability to monitor one’s own and other’s feelings and emotions, to discriminate among them, and to use this information to guide one’s thinking and action (Mayer Salovey, 1990). The MSCEIT ability models define EI as a form of intelligence, whereas mixed models take a widespread approach and include dispositional, motivational, and situational variables in their take on EI (MacCann, Matthews, Zeidner, Roberts, 2003). The two tests have different measurement approaches. The MSCEIT uses tests of maximalShow MoreRelatedEmotional Intelligence (Ei) Is A Topic That Has Not Been1647 Words   |  7 PagesEmotional intelligence (EI) is a topic that has not been completely explored because organisations do not see it as a current need, unless the role itself requires a measure. For this reason, it is a debated topic and still being researched. This essay will analyse the value of testing emotional intelligence during the employee selection process, its benefits and drawbacks, and the implications for the organisations to ensure testing emotional intelligence is valuable. In terms of employee selectionRead MoreThe Topic Of Emotional Intelligence ( Ei )1495 Words   |  6 PagesThe topic of emotional intelligence (EI) has been heavily debated for a number of years. There have been many theories and many different angles of research that psychologists have taken pertaining to EI, but none of that research has been overall conclusive in coming up with factual evidence of the true nature of EI. There have been many different criticisms concerning EI and it’s different methods of understanding. One psychologist says that, The first criticism is hat even if EI studies tap intoRead MoreThe Theory Of Emotional Intelligence1359 Words   |  6 Pagesway, or did they learn it along the way? Emotional Intelligence Theory attempts to answer all of these questions, and gives the rest of us a guideline on how to scale that emotional intelligence ladder. 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First of all, we have to determine the meaning ofRead MoreEmotional Intelligence : Can It Be Taught At Distance Learning Mba Programs?1055 Words   |  5 PagesEmotional Intelligence Students Name University Name, Course Number Emotional Intelligence: Can it be taught in Distance Learning MBA Programs? Today, managers need more than just top notch technical and intellectual skills. Leaders in healthcare, business and technology are learning that successful managers need high Emotional Quotient (EQ) or Emotional Intelligence (EI) to work effectively. This paper will define EQ and EI and then explore why these skills improve workplace functioningRead MoreThe Original International Personality Item Pool1024 Words   |  5 Pagesscale level of the IPIP-50 (Guenole Chernyshenko, 2005). Before looking at the research examining the relation between the FFM and EI, this literature review first presents some of the current findings in EI. 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The Impact Of Social Networking On The Lives Of People

Introduction Social Networking Services, as we so call it as the SNS, is one of the modern Information and Communications Technologies that have improved the flexibility in the lives of people. We are now able to reach people effortlessly within a matter of seconds as if from they are next-door neighbors, even though they are dispersed all around the globe. Not only that we could be in touch with people one-on-one, SNS also provides us with ample amount of information – world news, local news, global events, corporation updates and so on - in ineffable terms. Therefore, in terms of the flexibility of the ICT, it would be convincing enough to define it as the enhancement of the reach of people, information and augmenting the capability to form a tighter bond between those of two associated objects. However it is important to examine how this was possible. What have made all these capable? Facebook, Twitter, Instagram and all other uprising Social Networking Services that we know of, exis t within the identical platform called the Internet. Social Networking Services could have not have been present if it was not for the existence of the Internet. The worldwide web network service of the Internet provided a colossal mesh binding the world together forming another interpersonal matrix. Nevertheless, it is not the key concern of this essay to make tribute how the world of ICT, especially when it comes to the Internet considered as a sponsor of such flexibility to mostShow MoreRelatedSocial Networks988 Words   |  4 PagesSocial Networking Sites The Internet and technology are growing bigger and bigger every day and before we know it technology is going to pass us by. With the invention of the Internet and Social Networks, the possibilities are endless. 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Studies have shown that most SMEs rise with the help of social network has developed its own platform to encourage entrepreneurs to exceed at the highest level possible to be able to compete in the major market. The major findings have emerged as follows: A) Since social networking toolsRead MoreSocial Media Cause Anger And Stress925 Words   |  4 PagesSocial networking is very common these days and has enormous effects and influence over the lives of many people worldwide. Many people, especially young adults are addicted to social media such as Snapchat, Instagram, Facebook, and other social networking sites. Moreover, the use of social networking sites have both positive and negative impacts in our life. Some people are using them to keep in touch with their friends and family, and others want to show the world what they are doing by postingRead MoreThe Positive And Negative Implications Of Social Networking Sites1604 Words   |  7 Pagesimplications of social networking sites. Introduction Social networking sites have become a big part of our lives. These sites are indeed twofold, and their impact on society is both positive and negative. My essay will, therefore try to answer both sides of the impact social networking sites have in today’s culture. A website article by (Shruti Tripathi Chopra 2015) stated that in 2008 Facebook made and estimated $300 million, that rose to a profit in 2014 of $2.9. The positive implications of social networking

The Pros and Cons for the Company to Go Public free essay sample

Small companies looking to further the growth of their company often use an IPO as a way to generate the capital needed to expand. Although further expansion is a benefit to the company, there are both pros and cons that arise when a company goes public. As such there is a need to evaluate the factors Starhill REIT took into consideration before issuing their IPO. The factors, that is, the advantages and disadvantages are listed and described below: PROS Less Need to Borrow According to investopedia, Public companies, those whose shares are available for purchase on stock exchanges, can fund major initiatives such as expanding into new markets and entering new product lines by issuing common stock. Capital can also be used to fund research and development, fund capital expenditure or even used to pay off existing debt. So IPO is a way for Starhill to obtain money that they do not have to repay. We will write a custom essay sample on The Pros and Cons for the Company to Go Public or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Anonymous investors who purchase the stock are not considered as lenders; they are much rather considered as the companies co-investors. Stock as Currency and Public Awareness Tool The â€Å"International Journal of Business† states that when public companies expand by issuing IPO they can use their stock in the future to acquire other businesses, they can use their own stock as part of the purchase price. This method ties the owners of the acquired entities to the buyer, in this case Starhill, and brings them on board in a meaningful way. Similarly, they can use their own stock as collateral for secured loans. Another pro is an increased public awareness of the company because IPOs often generate publicity by making their products known to a new group of potential investors, be it individuals or institutional investors the company places itself at an advantage. Stock Options After companies have undergone their initial public offering, they can use stock options in various ways: as employee stock options, which are issued as non-cash compensation for deserving employees, and to outsiders consultants, attorneys and others for services rendered. If the stock price rises, the option holders enjoy a direct benefit. Stock options are commonly used during a companys startup phase to save cash and later as part of senior executives ongoing compensation packages. Potential customers Going public is often an outward sign of credibility solid reputation and achievement as stated by investopedia. This tends to pay off not only with the investing public but also with bankers, industry participants and customers. Because a public offering will increase Starhill’s net worth, they should find it possible to borrow funds in the future on more favorable terms. Banks, which are also considered as potential investors use the companys debt-to-equity ratio as an indicator of loan risk; most bankers prefer that total debt never exceed the net worth of the company. Diversification of risk When owners of a company decide to offer IPO of their company it is also a way of diversifying the risk that they used to bare alone. New investors also take on some of the risk the company may face in the future. And current owners of the Starhill REIT may have new capital which they may use to acquire stock from other public companies to expand their portfolios and minimize their risk.