MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

For a reaction to be spontaneous, the change in Gibbs free energy must be negative, i.e., G The relationship between G, enthalpy change H, and entropy change S is given by the Gibbs equation: G = H - T S Since absolute temperature T is always positive, for G to be negative at all temperatures, both terms contributing to G must favor spontaneity. This happens when: H S > 0 (increase in entropy) Under these conditions, the term -T S is negative, and since H is also negative, their sum G will always be negative regardless of the temperature. Answer: H 0