Calculate ΔS°_rxn for the following reaction.The S° for each species is shown below the reaction.
N₂H₄(l) + H₂(g) → 2 NH₃(g)
S° (J/mol^∙K) 121.2 130.7 192.8

Question

Calculate ΔS°_rxn for the following reaction.The S° for each species is shown below the reaction. N₂H₄(l)+ H₂(g)→ 2 NH₃(g) S° (J/mol^∙K)121.2 130.7 192.8

Quizplus · Accepted Answer

The change in entropy (ΔS°) for a reaction is calculated by subtracting the sum of the standard molar entropies of the reactants from the sum of the standard molar entropies of the products.ΔS°_rxn = ΣS°_products - ΣS°_reactantsΔS°_rxn = [2 × S°(NH₃)] - [S°(N₂H₄) + S°(H₂)]ΔS°_rxn = [2 × 192.8 J/mol^∙K] - [121.2 J/mol^∙K + 130.7 J/mol^∙K]ΔS°_rxn = 133.7 J/mol^∙K

Calculate ΔS°rxn for the Following Reaction

Calculate ΔS°_rxn for the Following Reaction