110131_Homework4

# 110131_Homework4 - use f V P = g P V You can also use dU =...

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Chem340 Physical Chemistry for Biochemists Dr. Yoshitaka Ishii Homework 4 Due Date Feb 9, 2011 P2.4, P2.32 Q3.3, Q3.6 P3.2, P3.3, P3.4, P3.7, P3.10, P3.12, P3.15, P3.16, P3.19, P3.21, P3.22, P3.23, P3.30 (Use data in Appendix B if needed) 1. Show Dq = dU – Dw is not an exact differential with respect to V and T for an ideal gas. (Hint: Use Dw = -P(V,T)dV and dU =Cv(T)dT). 2. Assuming that dH is an exact differential, show dU is also an exact differential for P and V. (Hint: Define dH as dH = f(P,V)dP + g(P, V)dV &
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Unformatted text preview: use ( f/ V ) P = ( g/ P ) V ). You can also use dU = d(U - PV) = dU - pdV - VdP. 3. Consider the isothermal expansion of 1.00 mol of an ideal gas at 450. K from an initial pressure of 25.0 bar to a final pressure of 5.00 bar. Plot V (x axis) vs P ext (y axis) graphs for (a) a reversible case that P = P ext and (b) a case that P ext = 5.00 bar. (c) Indicate the area that corresponds to the work | w | done by system in each graph. (d) Which graph gives you a greater work?...
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