Chemistry - Thermodynamics - II Question with Solution | TestHub

For P(V-nb)=nRT, (∂U/∂V)_T=T(∂P/∂T)_V-P=0, so isothermal U is constant: A. Ideal gases satisfy C_p,m-C_v,m=R: B. Reversible adiabatic compression from the same initial state to the same final volume costs more work for larger γ; monatomic He, not CH₄, is largest, so C is false. Enough simultaneous heating can make ΔS=nC_v ln(T₂/T₁)+nR ln(V₂/V₁) positive even during compression: D. Answer A,B,D.