• Jul 18, 2025 Standard Entropy = 205.2 J/mol·K S°(H₂O(l)) = 70.0 J/mol·K ΔS°rxn = [2 70.0 J/mol·K] – [2 130.7 J/mol·K + 1 205.2 J/mol·K] = -326.6 J/mol·K The negative value indicates a decrease in disorder, expected given the formation of a more ordered liquid phase from gaseous reactants. 3. Predicting Reaction Sp By Margret West
