MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

The given reaction is S _ (s) + O _ 2(g) SO _ 2(g) The relationship between enthalpy change ( H) and internal energy change ( U) is given by: H = U + n_g RT where n_g is the change in the number of moles of gaseous substances. n_g = moles of gaseous products - moles of gaseous reactants For the given reaction, SO _ 2 is the only gaseous product and O _ 2 is the only gaseous reactant. Solid sulfur ( S _ (s) ) is not considered. n_g = 1 - 1 = 0 Substituting n_g = 0 into the equation: H = U + (0)RT H = U Answer: H = U