b Consider the reaction: Ca(s) +2 H₂O(l) →Ca(OH)2(aq) +2H2(g) AHfᵒ(kJ/mol) -285.83 -1002.82 S°(J/K)-mol 41.59 69 69.95 -74.5 130.7 Is the reaction spontaneous at 298 K? ΔΗ° = -431.16 AS⁰ = 5.41 AG° -432.77 Yes No

b Consider the reaction: Ca(s) +2 H₂O(l) →Ca(OH)2(aq) +2H2(g) AHfᵒ(kJ/mol) -285.83 -1002.82 S°(J/K)-mol 41.59 69 69.95 -74.5 130.7 Is the reaction spontaneous at 298 K? ΔΗ° = -431.16 AS⁰ = 5.41 AG° -432.77 Yes No

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter16: Spontaneity Of Reaction

Section: Chapter Questions

Problem 5QAP: On the basis of your experience, predict which reactions are spontaneous: (a) PbO2(s)Pb(s)+O2(g)(b)...

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Question

b Consider the reaction:
Ca(s)
+2 H₂O(l) →Ca(OH)2(aq) +2H2(g)
ΔΗf°(kJ/mol)
-285.83
-1002.82
S°(J/K)-mol
41.59 69
69.95
-74.5
130.7
Is the reaction spontaneous at 298 K?
ΔΗ° = -431.16
AS⁰ = 5.41
AG° -432.77
Yes
No

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