Sunday, March 15, 2020
Hess Law of Heat Summation Essay Example
Hess Law of Heat Summation Essay Example Hess Law of Heat Summation Essay Hess Law of Heat Summation Essay Hess Law of Heat Summation Hess Law states that: The enthalpy change for any reaction depends on the products and reactants and is independent of the pathway or the number of steps between the reactant and product. BASICALLY:    Hess Law states the heat evolved or absorbed in    a chemical process is the same whether the process    takes place in one or in several steps      ;This is also known as the law of constant heat summation. All it means is that no matter how many steps the chemical    reaction proceeds through, the total heat evolved or absorbed    is the added heat values of each step and will always be    a constant figure for that process. For example:    When phosphoric acid (a tri hydrogen acid) is neutralized    with a base, the hydrogens are neutralised in 3 steps:    STEP 1:   H3P04 + NaOH  ; NaH2PO4 + H2O  gives X amount of heat    STEP 2:   NaH2PO4 + NaOH  ; Na2HPO4 + H2O  gives Y amount of heat    STEP 3:   Na2PO4 + NaOH  ; Na3PO4 +H2O  gives Z amount of heat    Therefore, the total heat ofà ‚ reaction (   Hrxn) is equal to: There are two (2) ways to calculate the heat of reaction using Hess Law: 1   Equation Method (Algebraic Method) 2   Heat of Formation Method (Summation Method) Equation (Algebraic) Method Strategy:     add equations for reactions with known enthalpies     so that their net result is the desired reaction Sample Problem 1: Use the equations below to determine the enthalpy of reaction for the decomposition of hydrogen peroxide: H2O2(l)         H2O(l)    +    1/2 O2(g) The equations are: 1     H2(g)   +   O2(g)       H2O2(l)   2     H2(g)   +   1/2 O2(g)      H2O(l) Hf =  188 kJ Hf =  286 kJ Solution: Sample Problem 2: Use the following equations: 1     1/2 N2(g)   +   3/2 H2(g)       NH3(g) 2     1/2 N2(g)   +   O2(g)     NO2(g) 3     H2(g)   +   1/2 O2(g)     H2O(g) Hf =  46. 0 kJ Hf = +34. 0 kJ Hf =  242. 0 kJ to calculate the enthalpy of reaction for: 4 NH3(g)   +   7 O2(g)        4 NO2(g)   +   6 H2O(g) Solution: Practice Problem: Calculate the heat of reaction for the oxidation of one mole of ethanol to ethanoic acid: C2H5OH(l)   +   O2(g)         CH3COOH(l)   +   H2O(l) Use the equations below:      C2H5OH(l)   +   3 O2(g)          2 CO2(g)   +   3 H2O(l) 2     CH3COOH(l)   +   2 O2(g)         2 CO2(g)   +   2 H2O(l) Hc =  1367 kJ Hc =  874 kJ Enthalpy of Formation (Summation) Method Standard Molar Enthalpy of Formation: (             )  the amount of ____ (absorbed or released) when _________ of  a compound is formed from its _________________ in their  standard states  most enthalpies of formation are  ve (__________________)? therefore, most compounds are ___________ stable than the  elements they are made from   the enthalpy of formation of an element in its s tandard state       is _____ because it is usually its most stable form! Write the formation equations for: a)  methane gas: b)  calcium carbonate: c)  hydrogen chloride gas: (Look at the Table! ) How to Use    Hf to Calculate    Hrxn Recall:     Hrxn = therefore, Hrxn =     ( n   Hf products)          ( n   Hf reactants) Sample Problem 1: Using the enthalpies of formation, calculate the enthalpy of reaction for:    CH4(g)   +   2 O2(g)       CO2(g)   +   2 H2O(g) Practice Problem: Use the summation method to determine the enthalpy of reaction for: 4 NO2(g) + 6 H2O(g) 4 NH3(g)   +   7 O2(g) Homework:   p. 247 #13 16   p. 251 #17 20   p. 254 #21 24   the following three questions:   Use the summation method to calculate each   of the following:   a)  CO2(g)  +  H2(g)      CO(g)  +  H2O(g)   b)  C2H5OH(l)  +  3 O2(g)       2 CO2(g)  +  3 H2O(l)   c)  C2H6(g)  +  7/2 O2(g)     2 CO(g)  +  3 H2O(l)
Thursday, February 27, 2020
Practice Enhancement role of the Mentor on the facilitation of Essay
Practice Enhancement role of the Mentor on the facilitation of learning in your current place of work - Essay Example An example of this case is the "Nursing" profession. Whereas in the latter case, the mentee decides to seek the mentor's guidance because the mentee wishes to take up that particular profession solely out of interest or need. The process of mentoring is in fact so vast that it is offered as a course and therefore, has got many sub-themes attached to it. But two of the topics that will be critically analyzed in the present essay are: The essay is set in the backdrop of an outpatient wing of a local hospital. Within this specified work area, the essay focuses on the role played by the mentor in applying the relevant theories connected to the two themes mentioned above, and aims to critically analyze the outcomes of the application of all such theories in the work area. As is inherent, the mentees in this essay will be trainee nurses, on whom all the proposed practices will be implemented. Everyone cannot become a successful mentor even if they aspire to become one. It turns out that many of them possess the inherent qualities that are necessary for blossoming into effective mentors, but fail to become one because of the lack of having the ability to implement the knowledge that they possess or communicate their ideas and guide the people under them in an effective manner. It has also been found that many of them consider the outlined procedures of mentoring to be a farce, which is absolutely not the case. The experiences of successful mentors have shown that most of them stuck to the basics as outline by the theories of mentoring, and went on to yield outstanding results.Mentoring is highly dependent on a one-on-one relationship between the mentor and every mentee. But this is not possible most of the time as there are irregularities in almost every case. As such, it is the duty of the mentor to instill confidence into the trainee and this can be achieved by motivati ng him/her as also encouraging and not deploring him in case the trainee has done some mistake. The implementation of this principle demands a great deal of perspiration and patience on the part of the mentor. Therefore, it is necessary to outline the various modes, which are adopted by a mentor in order to affect the basic objective of training the mentees under him (Richard Luecke, 2004): Mentors share their own experiences with the mentees. This includes successes as well as failures. This gives the trainee an insight on what must be adopted and what must be avoided. Mentors are supposed to instill a sense of professionalism into the mentee, which can be initiated by modeling the requisite professional behavior. Mentors guide the trainees under them by training them on various aspects that cannot be taught in college. Mentors provide complex cases for trainees to solve and
Tuesday, February 11, 2020
Alternative Fuel Essay Example | Topics and Well Written Essays - 2500 words
Alternative Fuel - Essay Example For example, smog can cause eye and respiratory tract irritation, and carbon monoxide can inhibit the ability of a person's blood to carry oxygen to vital organs. The average vehicle, through its combustion of fossil fuels, also emits greenhouse gases. Greenhouse gases, such as carbon dioxide, methane, nitrous oxide, hydrocarbons, and chlorofluorocarbons surround the Earth's atmosphere like a clear thermal blanket, allowing the sun's warming rays in and trapping the heat close to the Earth's surface. This natural greenhouse effect keeps the average surface temperature at around 60F (33C). However, the increased use of fossil fuels during the last century has created an enhanced greenhouse effect, known as global warming. And transportation has played a large role in this increase. During the 1990s, the annual growth rate of U.S. greenhouse gas emissions from transportation averaged 1.6 percent. In 1999, some 82 percent of U.S. greenhouse gas emissions consisted of carbon dioxide released by the combustion of energy fuels. The U.S. Environmental Protection Agency (EPA) estimates (Durbin et al, 2000) that each year the average light vehicle in the United States releases 10,000 pounds of carbon dioxide into the air. Motor gasoline contributed close to 300 million metric tons of carbon dioxide, making it the largest single source of U.S. carbon dioxide emissions. By reducing vehicle emissions, AFVs and advanced vehicle technologies help combat both air pollution and global climate change. Alternative fuels not only burn cleaner producing lower emissions, but some are even renewable, unlike fossil fuels, which means we could develop a continuous supply of them. The alternative fuels in use today include ethanol, biodiesel, methanol, natural gas, propane, electrici ty, and hydrogen. Biofuels are renewable since they are produced from biomass i.e. organic matter, such as plants. They generate about the same amount of carbon dioxide (a greenhouse gas) from the tailpipe as fossil fuels, but the plants that are grown to produce the biofuels actually remove carbon dioxide from the atmosphere (ERCL, 1999). Therefore, the net emission of carbon dioxide will be close to zero. Diesel engines can function efficiently with biodiesel, a fuel made from vegetable oil. A combination of vegetable oil and diesel fuel produce fewer emissions than straight diesel. Commercially available biodiesel is offered in blends of 5% vegetable oil to 95% diesel (B5), 10% to 90% (B10) and 20% to 80% (B20). Consumers can have their diesel engines converted for around 800 dollars-to run on 100% vegetable oil (Anthony & Cornish, 2001). The oil produces no harmful emissions and the cost can be nominal or free since many consumers get used vegetable oil from fast food restaurants, but consumers mu st filter their used oil, which is complicated and the equipment is costly. In addition, buying pure vegetable oil can cost more than straight diesel fuel. Fuel consumption for vegetable oil is similar to diesel, which gets 20 to 30 percent better mileage than gasoline (ERCL, 1999). Emissions are much less toxic than those from gasoline, and its carbon neutral because the carbon dioxide absorbed by the plant from which the oil is derived offsets CO2 generated when it is used as fuel. With the increasing popularity of vegetable oil as a motor fuel,
Friday, January 31, 2020
My Leadership Style Essay Example for Free
My Leadership Style Essay According to the leadership assessment, I am more of task-oriented leader than a people-oriented leader, though I scored high in both areas, therefore I have a healthy balance of both which is important for a leader in any company. My leadership style allows me to get my work completed in an organized fashion, while being open to other ideas; I can focus on the small projects while continuing to see the big picture or vision. Because I score higher on the task-oriented side, I can be more autocratic in my thinking. This will limit my ability to show my apathy for my staff and employees Furthermore, I am also a transformational and charismatic leader. I am most effective in smaller organizations that have direct interactions with my staff. According to Robbins, this helps to make me effective as a leader, which will give a company â€Å"low turnover, higher productivity, lower employee stress, and burnout, and higher employee satisfaction.†Furthermore, Robbins shared that this leadership style is not effective with those who are â€Å"highly individualistic and do not readily cede decision-making authority.†Since I am able to communicate with my staff the expectations, visions ad engage my staff, I also have a Charismatic leadership style. I continuously focus on the end goal, big picture and tie that big picture to the work of my staff, making it attainable to my staff. One of the major downsides to charismatic leadership is that it can be situational, according to Robbins. Role in Company The role I would like to pursue within the company is that of a managerial supervisor. According to Robbins, organizations need strong leadership and strong management for optimal effectiveness. I feel that because I have leadership and managerial traits and characteristics, I would be a great candidate for that particular role. In a managerial supervisory role, I am a direct leader. I work directly with my staff on a one-on-one basis and in a team format; I will have more influence directly on my staff. As the managerial supervisor, I am able to support, recognize, develop, plan, and coach/mentor my staff while monitoring, setting goals, and overseeing day to day operations. This is evident because of my healthy balance of task and people orientation. Leadership theories applicable to my leadership approach The Big Five Trait Leadership Theory is applicable to my leadership approach because research has shown that the big five personality factors are strong indicators for job success and performance. I scored high in the areas of extroversion and conscientiousness. The positive factors about scoring high on conscientiousness’s is that overall, those with high marks in this area have better job performance and those are more reliable, thorough, organized, angle to plan, and persistent according to the assessment. These traits are consisted with those of task-oriented leaders. However, the Leadership Substitute Theory would be counter indicated for the areas of subordinate, task, and group/organizational characteristics. This is because my staff could need little direction from me as their supervisor if they have extensive experience. Also, when staff repeats their task over and over, they become proficient and don’t need feedback, but are building their own motivation. As a task-oriented, transformational, and charismatic leader, I would struggle more with staff who are more independent or did not work well in the group. I like to give freedom to my staff, but my style makes it necessary to know what is going on in the jobs at all times. Conclusion My leadership style is transformational, charismatic with my main focus on task-oriented management. I work hard to inspire my staff, while also meeting deadlines. I focus better when I’m working with a team rather than individuals who do their own thing. Research has shown that my leadership style is an asset to many companies if utilized in the right way. This is why I would like a position that allows me to shine, take the lead of a team, while focusing on the companies â€Å"big picture.†References Robbins, S. P., Judge, T. A. (2011). Organizational behavior (14th ed.). Upper Saddle River, NJ: Pearson Education. Yuki, G. (2010). Leadership in organizations (7th Ed.) Upper Saddle River, NJ: Pearson Education.
Thursday, January 23, 2020
Baldwins My Dungeon Shook: A Letter to my Nephew Essay -- Baldwin Dun
Baldwin's My Dungeon Shook: A Letter to my Nephew Does the American Dream belong to every one or does it exclude some individuals? The American Dream is a very powerful force that molds America. It has existed for many generations but has it changed over time? The foundation of the Dream tends to stay the same that is the pursuit of happiness, hope, freedom, justice and equality. The concepts within the American Dream should alter to fit the changes of society. The breakthroughs and obstacles that America overcomes should shift the American Dream. Society may see the American Dream as a dangerous power causing them to be scared to challenge the concepts of the traditional American Dream. Will society become dysfunctional if someone challenges the American Dream or will it make our country stronger and more diverse? According to James Baldwin’s â€Å"My Dungeon Shook: A Letter to My Nephew†African Americans cannot obtain their piece of the American Dream. Baldwin wrote a letter to his nephew in hope of guiding him through life. Baldwin had many words of wisdom to share, mostly words provoked by pain and anger. Baldwin wanted to teach his nephew about the cruelty of society. His main point was to teach his nephew not to believe the white man and his words. He wanted to encourage his nephew to succeed in life but not to expect the unassailable. By believing the white man one can not succeed but by knowing where one comes from will lead to success was the foundation of Baldwin’s message (243-246). When reading â€Å"My Dungeon Shook: A Letter to my Nephew†, it was clear that Baldwin was not just writing a letter to his nephew but to society by interacting personal thoughts with public awareness. Although Baldwin’s letter was addressed to his nephew, he intended for society as a whole to be affected by it. â€Å"This innocent country set you down in a getto in which, in fact, it intended that you should parish†(Baldwin 244). This is an innocent country, innocent only because they know not what they do. They discriminate the African American by expecting them to be worthless, by not giving them a chance to prove their credibility. Today African Americans are considered to be disesteemed in society. They are placed in this class before they are even born just like Royalty obtains their class before they are even conceived. We may think that this is a paradox but when d... ...ow by forgiving the people who hurt him and Baldwin is trying to redeem Jesus’ example by forgiving the people who hurt him. Forgiveness is the key that unlocks the chains that embodies mankind. Forgiveness could be thought of as the potion that unites America and brings equality to the redeemed world. Although the American Dream is considered to be the link that binds society, there are some individuals that do not posses link to unit. The African Americans have been struggling for many years to obtain the piece of the American Dream, their place in America. Joseph Kennedy has frustration and anger built up while trying to find his place in America, â€Å"Goddamn it! I was born in this country! My children were born in this country! What the hell does someone have to do to become an American†(qtd. In Harris 369)? If someone challenges the concepts of the American Dream then maybe our country can unite. Do not fear the American Dream, yes it is a powerful force that molds society but each individual controls the power. If one does not believe in the American Dream then the power of the Dream is weakened. Would America unite and become equal if someone challenges the American Dream?
Wednesday, January 15, 2020
Workforce
The workforce is contingent on the willingness of personnel and sites . The workforce is the main concern of employers everywhere. All areas of employment are touched by economics and it consist of the figure of births rates, and the quantity of training each person receives. 100 years ago, most jobs were industrial in nature, what I mean is that individuals worked in factories or on an assembly lines. These types of positions weren't very challenging because it's a situation that was repetitious because the worker repeat steps. Because of new technology today, everything happens to be more demanding, very aggressive and creative. Women are employed within position that once was considered â€Å"only men were productive in. Work shifts are divided into three shifts for several organizations. They're basically eight hours a shift and the employee usually work forty hours a week. Over the years the workforce has added four generation of workers. This has caused a distinctive effect on the workforce and organizations have employed and facing age differences. The HR department has come to the knowledge that the workforce of the past as a consequence will influence the future status of many organizations. They realize that the success of the organization depends on being able to hire workers. Plus the facts show that many people are not retiring but continue to work well past the age of 65. HR specialists find that they're having to formulate additional resolutions to meet the demands relating to the workforce with the aging workers. Which requires HR specialists to understand and be able to execute ways to create jobs and to fill them with acceptable workers. Meanwhile workers and jobs are always transforming so organizations realize that they have diversity and the skill to maintain a balanced workforce being competent to accomplish their goals for the future of the organization. Also, companies have moved to global level with improved technology and communication. Besides more women employees entered the workforce which was not the state 100 years ago where women lives tended to be centered around their families. During World War I changed who the workforce would use once the men were either volunteering or being drafted to serve in the military which resulted in there was no one to fill the positions. So businesses hired the women to work in the men's place. After showing the factories that the women were capable to carry out the duties that the men could do, but they were paid less for the same job. Since then women have demanded rights for equal pay and equal treatment. Because the workforce have become more diverse with gender, age, and culture it has caused organizations to change how they attain workers and maintain their numbers. The older workers are still present in the workforce is making HR to consider alternative ways for hiring, training, and what type of benefits plans to offer as enticements.Today HR managers needs to spend considerable time and money in training in new technology and keep them updated. The future US workforce groups in 2025 would be mostly aged population over 60 years. The workforce I filled with many kinds of technology such as computers, internet, smart phones and many mobile devices that has opened communication where everything seems to move at the speed of light. Therefore, HR will need to be on their toes to meet every task in the future.ReferencesAnderson, B. E. (2000). Journal of Economic Perspectives. Worker Protection Policies in the New, 207-214.DeCenzo, D. A. (2016).Fundamentals of Human Resource Management. Danvers, MA: John Wiley ; Sons.Effortless HR. (2018).Retrieved from The Past, Present and Future Workforce: https://www.effortlesshr.com/blog/present-future-workforce-generations/Huczynski, A. ;. (2010). Organizational behaviour.London: Financial Times Prentice Hall.Khan, A. H. (2012). Impact of job satisfaction on employee performance: An empirical study of autonomous Medical Institutions of Pakistan.African Journal of Business Management, 2697.Micheal Bailey. (2018). Retrieved from Demographic shifts and the HR challenges of the f uture: https://www.michaelbaileyassociates.com/news/hr/demographic-shifts-and-the-hr-challenges-of-the-futureWomen in the Workplace. (n.d.).Retrieved from http://articles.timesofindia.indiatimes.com/2010-09-15/edit-page/28241044_1_indian-women-chinese-women-chinese-counterpart
Monday, January 6, 2020
Art Therapy Services For Children At Risk At The Hope...
As an intern art therapist, I provide art therapy services for children at risk at the Hope Gardens Community Center (HG) in Brooklyn, New York. Many children at HG are referred to therapy for various reasons such as anger, self-harm ideation and low self-esteem. Inner city children are sometimes exposed to societal, environmental, and domestic stressors, and those stressors can give rise to children’s behavioral and psychological problems (Camilleri, 2007). In this paper, I will discuss a client’s case revolving around the Attachment theory and Object relations theory. Cindy (pseudonym) is an eight-year-old African-American female. She is in third grade and has attended the after-school program at HG. She was referred to art therapy by the after-school program teacher, due to her self-harm ideation and self-harm attempts. It is reported that she verbalized a desire to â€Å"disappear†and wished she did not â€Å"exist.†She scratched her arm to harm herself and threatened to smash her fingers in the door. The teacher also indicated that Cindy demands individual attention. Cindy’s mother mentioned that Cindy has a hard time opening up to anyone. She has no close friends and often expresses feelings that no one cares about her. She does not interact with strangers and wants to fight with her friends. When I observed Cindy in the classroom at HG, Cindy seemed to build a positive relationship with her peers; however, did not appear to have any close relationship with any one child.Show MoreRelatedThe For Helping Others With The En d Game Of Jumping9894 Words  | 40 Pagesillness and the ability to live a more meaningful life often leads individuals to pursue the helping professions. 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