Learn How to Solve an Entropy Change Problem

For problems involving changes in entropy, knowing if the change should be positive or negative is a useful tool to check your work. It is easy to lose a sign during thermochemistry homework problems. This example problem demonstrates how to examine the reactants and products to predict the sign of the change in entropy of a reaction. Entropy Problem Determine if the entropy change will be positive or negative for the following reactions:A) (NH4)2Cr2O7(s) → Cr2O3(s) 4 H2O(l) CO2(g)B) 2 H2(g) O2(g) → 2 H2O(g)C) PCl5 → PCl3 Cl2(g) Solution The entropy of a reaction refers to the positional probabilities for each reactant. For instance, an atom in gas phase has more options for position than the same atom in a solid phase. This is why gases have more entropy than solids. In reactions, the positional probabilities must be compared for all the reactants to the products produced. Therefore, if the reaction involves only gases, the entropy is related to the total number of moles on either side of the reaction. A decrease in the number of moles on the product side means lower entropy. An increase in the number of moles on the product side means higher entropy. If the reaction involves multiple phases, the production of a gas typically increases the entropy much more than any increase in moles of a liquid or solid. Reaction A (NH4)2Cr2O7(s) → Cr2O3(s) 4 H2O(l) CO2(g)The reactant side contains only one mole where the product side has six moles produced. The was also a gas produced. The change in entropy will be positive. Reaction B 2 H2(g) O2(g) → 2 H2O(g)There are 3 moles on the reactant side and only 2 on the product side. The change in entropy will be negative. Reaction C PCl5 → PCl3 Cl2(g)There are more moles on the product side than on the reactant side, therefore the change in entropy will be positive. Answer Summary Reactions A and C will have positive changes in entropy.Reaction B will have negative changes in entropy.

Canadian Culture What Distinguishes It From The...

Canadian culture? What distinguishes it from the American? Culture is something that distinguishes one national or ethnic group from another, it is the characteristics and knowledge of a particular society, defined by everything from language, religion, cuisine, social habits, music and arts. Canada and the USA are the neighbor countries which located in the North America. At first glance they are very similar. People speak the same language, listen to the same music and wear the identical brands. However, if you compare the culture of these countries, it becomes obvious that they differ from each other as France distinguishes from China or England from Spain. So, what are these differences? Canada s culture can be considered as unique, because it represents the mixture of many cultures into one country. Cultural life of Canada has many influences because the various people who immigrate to the country in North America are encouraged to keep their culture. These immigrants also teach the people they meet about their own ways of life. In its broadest sense, Canadian culture is a mixture of British, French, and American influences, all of which blend in every aspect of cultural life, from film making and writing to cooking and playing sports. All of these influences are strongly felt in Canadian daily life. At the same time, is not exactly easy to define what is American culture since to be an American can mean many things. Modern America has also beenShow MoreRelated Comparing Canada and America Essay examples1124 Words   |  5 Pagesidentity as a delightful complexity of cultures and customs, government and heroes. On the other hand, Canadians are simply not Americans by government and technology. Canada’s own identity starts with our remarkable sense of culture and customs. For the native peoples, the Canadian identity stretches thousands of years into the search of struggles to retain elements of their ancient culture. 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Ethics and Moral Sensitivity free essay sample

Every person approaches life with a certain perspective or worldview which could be identified with a specific ethical theory. Which ethical theoretical framework best describes your personal worldview? Support your response with examples. The larger community-citizens, patients, inter professional team members, and nursing peers expect and are entitled to more than simply knowledge and competence. They expect good character from us. Virtues related with good character in nursing have progressed over time from those such as cleanliness and self-sacrifice to include several depicted in the framework and considered essential to the process of developing a healthy workplace and generous ethical climate such as compassion, fidelity, veracity, and prudence. Compassion is known as the cornerstone of healthcare providers practice, a critical trait necessary to the delivery of morally good care. For example, practicing compassion with other members of the acute and critical care team may also contribute to sustaining an ethical practice environment, because it is a component of moral sensitivity. We will write a custom essay sample on Ethics and Moral Sensitivity or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Moral sensitivity is necessary to recognition that an ethical dilemma exists. Without moral sensitivity and compassion, members of the healthcare team may not be able to see that a problem exists or may unknowingly tolerate ethically objectionable acts or conditions. This recognition also involves the ability to appreciate the perspectives of others, including team members, by acknowledging their values, beliefs, and obligations. Compassion and moral sensitivity include awareness of the various courses of action and how each may affect all members concerned, the patient, family members, and others on the inter professional team.