7aCDW11quiz7

# 7aCDW11quiz7 - P7A Quiz7 DL Sec Name(last I certify by my...

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Unformatted text preview: P7A Quiz7 DL Sec___ Name (last)_______________________ I certify by my signature that I will abide by the code of academic conduct of the University of California. (first) ____________________ Rubric Codes: Signature________________________________________ 1 (2pts). From the choices below, Circle the one with greater total thermal energy or circle both if they have the same total thermal energy: Hint: you might find it useful to recall that A. 500 atoms of a monotomic gas at 200 K B. 300 atoms of a diatomic gas at 200 K 2. (2pts) From the choices below, circle the one that correctly describes the available active modes for a diatomic gas at very high temperature. A. B. C. D. modes modes + modes + modes modes + 2 Vibrational modes modes + 2 Vibrational modes 3. (2pts) At equilibrium, which, if any, of the following expressions are true. (if all are true, just circle D) A. (for a solid) B. = C. D. All of the above 4a. (8pts) You are given the following : 3 moles of Neon (a monotomic gas), 2 moles of O2 a diatomic gas, and 2 moles of Au(s), all at the same temperature. Assume that the O 2 vibrational modes are not active ( i.e. the temperature is not high enough). Fill out the chart below: # of modes AU (s) Neon (g) O2 THERE IS A PROBLEM ON THE BACK Type of active modes 4b( 6pts). Now imagine that energy in the form of heat is added at the same RATE to all three substances until a temperature change of 10 degrees is achieved. Which of the substances will undergo this temperature change first? Remember that you know the following : Show your work and justify your answer ...
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