1. What is the coefficient of dV in the above problem for a van der Waals gas? Express your answer in terms of T, v, and the van der Waals coefficients a and b.
2. Consider a gas, initially at pressure pi and volume Vi, that is expanded adiabatically to final volume Vf. Find an expression for the work done by the gas in terms of pi, Vi, Vf, and γ .
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