F04_E4 - ID Number: _ _ - _ _ _ _ (LAST six digits only!)...

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ID Number: _____ _____ - _____ _____ _____ _____ (LAST six digits only!) Chemistry 111 November 11, 2004 Page 1. (18 pts) Page 2. (15 pts) Page 3. (18 pts) Page 4. (10 pts) Page 5. (23 pts) Page 6. (16 pts) Total: (100 pts)
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Chemistry 111 Page 1 out of 8 Exam IV /Fall 2004 ID Number: _____ _____ - _____ _____ _____ _____ (LAST six digits only!) 1. Fact: The equation below applies to isothermal processes. OS = T q rev Substitution of q reversible = n R T ln (V 2 /V 1 ) yields. OS = n R l n V 1 V 2 bl Since the temperature cancels, this last equation now works even if the temperature changes. True or false? Circle your answer. (02 pts) 2. Consider an ideal gas subjected to a physical process not involving a phase change. If the process is adiabatic, then q = 0. Therefore, if work is done on the system, the temperature must increase. True or false? Circle your answer. (02 pts) 3. One mole of Xe gas is heated from 20.00°C to 25.00°C. How much heat would be absorbed by this sample if it was being measured in an isobaric calorimeter? Show work. (06 pts) 4. The standard heat of formation of I 2 gas is a positive number. True or false? Circle. (02 pts) 5. The absolute entropy for O 2 gas is zero at 25°C and 1 atm because it is an element in its standard state. True or false? Circle! (02 pts) 6. Circle the one from the following that should have the highest absolute entropy. (02 pts) CH 4 (g), CH 3 CH 2 CH 3 (g), H 2 O (l), Fe (s), CH 3 -O-CH 2 CH 3 (g) 7. Given that the following reaction 2 HBr(g) H 2 (g) + Br 2 (l) has a Δ H° = + 72 kJ, what is the molar heat of formation of hydrogen bromide in kJ/mol? ____________ (02 pts)
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This note was uploaded on 02/08/2010 for the course CHEM 111 taught by Professor Kenney during the Spring '08 term at Case Western.

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F04_E4 - ID Number: _ _ - _ _ _ _ (LAST six digits only!)...

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