Which of the following statement(s) is/are true? — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

For a perfect gas, $C_{v,m}$ can depend on temperature due to activation of vibrational modes (A incorrect). If neither heat nor matter can enter or leave, the system could still exchange work (adiabatic non-isolated system), so not necessarily isolated (B incorrect). U, H, G, S are all state functions; cyclic integral of any state function is zero: oint dF = 0 (C correct). Final T = initial T does not mean isothermal throughout (e.g., cyclic process) (D incorrect).