Calculate ΔS°_rxn for the following reaction.The S° for each species is shown below the reaction. C₂H₂(g) + H₂(g) → C₂H₄(g)
S°(J/mol∙K) 200.9 130.7 219.3

Question

Calculate ΔS°_rxn for the following reaction.The S° for each species is shown below the reaction. C₂H₂(g)+ H₂(g)→ C₂H₄(g) S°(J/mol∙K)200.9 130.7 219.3

Quizplus · Accepted Answer

ΔS°rxn can be calculated by adding the products' S° and subtracting the reactants' S°. ΔS°rxn = [(S° CS12H14S - S° CS12H12S) + (S° H2S - S° H2)] = [219.3 - 200.9 + (130.7 - 131.0)] J/mol∙K = -112.3 J/mol∙K. Since ΔS°rxn = ΔS°_rxn, the answer is C.

Calculate ΔS°rxn for the Following Reaction

Calculate ΔS°_rxn for the Following Reaction