Thermodynamics

ECH 152A F2015, Midterm Name Bond, James ID 007 Q5. Write a pressure integral expression for the work done to a ﬂuid on the constant-energy path ( ¯ U 1 , P 1 ) → ( ¯ U 1 , P 2 ). Answer: Ignoring N , dW = - PdV always, and dW = - P ∂ V ∂ P      U dP for the given path. dW = - P V κ S P γκ S - 1 dP using Q4. W = Z P 2 P 1 " - P V κ S P γκ S - 1 # dP .

ECH | 152A | Thermodynamics | exam | ECH 152A F2015  Midterm Name B

ECH 152A F2015, Midterm 2 Name Bond, James ID 007 Rules: • No book, no notes, no electronic devices. • No talking. • Complete answers include demonstration of quantitative reasoning. An an- swer without supporting work is incorrect. • Answers that are di ﬃ cult to read, or are confusing, or which contain both ac- curate responses and inaccurate responses wit

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