카이스트 소재열역학의 이해 기말 족보.docx

Final Exam MS212, Spring Term 2xxx Prof. WooChul Jung June 21, 2xxx 1. (20 points) Answer the following short questions. a) When is true Identify a specific state variable that needs to be constant for it. b) Explain why Cp is always higher than Cv for ideal gas. c) At constant composition, does Gibbs free energy increase or decrease with increasing temperature increase decrease d) In a particular solid solution of A and B atoms with composition 50% A and 50% B, the probability that a particular bond is A-A (as opposed to A-B or B-B), is 0.4. This state has a given configurational entropy of mixing S0. In order to make the entropy increase, should I increase it, decrease it or is the system entropy already maximal increase decrease S is already maximal 2. (20 points) N2 gas follows van der Walls equation with a=1.39 L2atm/mol2 and b=0.0391 L/mol. Calculate ΔG and ΔS when one mole of N2 gas expands from 1 L to 2 L…
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