Read the Assertion and Reason below and choose the correct option. — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

A process is spontaneous at constant temperature and pressure if its Gibbs free energy decreases ($\Delta G < 0$), making Statement I correct. Statement II is incorrect because spontaneous reactions can be endothermic if there is a sufficiently large increase in entropy ($\Delta S > 0$) to make $\Delta G$ negative.