Select the correct statement(s): — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

By definition, for any reversible process, Δ S_univ = Δ S_sys + Δ S_surr = 0 (B correct). For an isolated system, no heat is exchanged, so Δ S_surr = 0, which means Δ S_sys = Δ S_univ = 0 for a reversible process in an isolated system (D correct). Δ G is only guaranteed zero for reversible processes at constant T and P. Δ S_sys can be non-zero for a reversible process in a closed system with heat transfer (A and C incorrect).