2009 CHE132 Ex01

2009 CHE132 Ex01 - CHE132S09Ex01 Multiple Choice Identify...

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CHE132S09Ex01 Multiple Choice Identify the choice that best completes the statement or answers the question. There is one bonus question, so you can miss one and still score 100%. Each question counts 5 points. ____ 1. Which of the following changes will always increase the internal energy of a system? A) The system gains heat and performs work. B) The system gains heat and work is performed on it. C) The system loses heat and performs work. D) The system loses heat and work is performed on it. E) None of the above changes will always increase the internal energy of a system. ____ 2. The heat, q, associated with a chemical reaction when it runs under conditions of constant pressure is called __________________. A) the change in enthalpy, H B) the change in energy, E C) the change in entropy, S D) the change in free energy, G E) something other than what is listed ____ 3. Graphite deposits can build up in blast furnaces used to produce iron from iron ore due to the following reaction. What is the enthalpy change for this reaction, given the enthapies of formation CO = - 110 kJ/mol and CO 2 = -393 kJ/mol. 2CO(g) C(s) + CO 2 (g) A) + 283 kJ B) - 503 kJ C) - 283 kJ D) - 173 kJ E) + 173 kJ ____ 4. Suppose you eat a one-third pound hamburger without bread, cheese, or other items. Approximately how long would you need to walk to use up the calories in the hamburger? Assume the mass of the hamburger is 150 g with 3.6 Cal/g and that walking requires 2.5 times a basal metabolic rate of 280 kJ/hr. A) 2 hours B) 3 hours C) 4 hours D) 5 hours E) 6 hours ____ 5. Which statement about temperature and heat is not correct? A) Temperature is a property, which when the same in two systems, results in thermal equilibrium, meaning that thermal energy will not be transferred spontaneously between the systems. B) Temperature can be thought of as a measure of the change in the number of accessible states when energy is added to or removed from a system (1/T ~ lnW).
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C) In order for thermal energy to be transferred spontaneously from one system to another, the entropy of each system must increase. D) Thermal energy is transferred from one system to another when the number of accessible
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This note was uploaded on 04/23/2010 for the course CHE 132 taught by Professor Hanson during the Spring '08 term at SUNY Stony Brook.

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2009 CHE132 Ex01 - CHE132S09Ex01 Multiple Choice Identify...

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