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PHY7AW10practice-q8 - 7A 2C Quiz 8 DL Sec Name last first...

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Unformatted text preview: 7A 2C Quiz 8 DL Sec. ____ Name_____________________ __________________ last first for office use only I certify by my signature that I will abide by the code of academic conduct of the University of California. Signature _____________________________ 3-2 Phen vol1. A sample of gas undergoes a process in which there is both heat and work. The temperature increases while theomena, D ume expands. What are the signs of ΔU, Q, and W? What are the relative magnitudes of Q and W? Briefly explain s and Question how you determined your answers. Phenomena The particulate nature of matter large range of phenomena that s fundamental idea regarding wha be simply developing a basic sufficiently far so that, with a Model of Thermal Energy it wil the empirically determined therm Specifically, how do we make se encountered in Chapter 1? Data Patterns In addition to the sampling o vaporization presented in Chapt with the capability of explain pressure and at constant volume data patterns are presented on th 2. For this problem, refer to the attached figure. Starting at T=1250K, 3 moles of a gas undergo a constant volume process in which the internal energy decreases by 1.37 kJ and the temperature decreases by 10K. What gas is this and why? Cvm R 9.5 8.5 NH3 7.5 6.5 5.5 4.5 3.5 N2 2.5 1.5 5 CH4 CO2 Cl2 7 2 This capac sever capac There gases capac tempe value have prono of the expla H2 Monatomic gases (He, Ar, Ne, etc.) 1000 1500 2 3 2 300 500 2000 T [Kelvin] Formulas: ΔU = Q+W; Cv = Q/ΔT; ΔEth = (1/2)R(#modes)(#moles)ΔT; R = 8.3 J/mol·K; W= -∫PdV ...
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