Question

Given the values of ΔH∘rxn, ΔS∘rxn, and T below, determine ΔSuniv.

Part A: ΔH∘rxn=− 89 kJ , ΔSrxn=− 144 J/K , T= 306 K. Express your answer using two significant figures.

Part B: ΔH∘rxn=− 89 kJ , ΔSrxn=− 144 J/K , T= 756 K. Express your answer using one significant figure.

Part C: ΔH∘rxn=+ 89 kJ , ΔSrxn=− 144 J/K , T= 306 K. Express your answer using two significant figures.

Part D: ΔH∘rxn=− 89 kJ , ΔSrxn=+ 144 J/K , T= 410 K. Express your answer using two significant figures.

Part E: Predict whether or not the reaction in part A will be spontaneous or nonspontaneous. (Assume that all reactants and products are in their standard states.)

Part F: Predict whether or not the reaction in part B will be spontaneous or nonspontaneous. (Assume that all reactants and products are in their standard states.)

Part G: Predict whether or not the reaction in part C will be spontaneous or nonspontaneous. (Assume that all reactants and products are in their standard states.)

Part H: Predict whether or not the reaction in part D will be spontaneous or nonspontaneous. (Assume that all reactants and products are in their standard states.)

Answer 1

Suniva AS sys + AS sorr. » Assure AS SUR = 8981000 = 291 The 306 As univ. = 291-144 = 1150 The ③ as sure 89 81000 = 118 JIK 752 A Suniv. = 118-144= [-30k Assurra - 8981000 = - 291 306 A Sunin. = - 291-144= {-440 ulk Assurr, a 8981000 = 216 Jik 410 Aswin = 216+144=1360] Ulk spontaneos Asiniu so spontanevy 9 Non-spontaneous Non-sponteneoy Spontemens