Any process will be spontaneous at constant pressure and temperature when — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

By the Second Law, a process is spontaneous if the total entropy of the universe increases ($\Delta S_{\text{univ}} > 0$). At constant temperature and pressure, this maps exactly to a decrease in the system's Gibbs Free Energy ($\Delta G_{\text{sys}} < 0$).