General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter18: Thermodynamics And Equilibrium
Section: Chapter Questions
Problem 18.8QP: What is meant by the standard free-energy change G for a reaction? What is meant by the standard...
Related questions
Question
Calculate the standard free-energy changes for the following reactions at 25°C.
2MgO(s) → 2Mg(s) + O2(g)
Inorganic Substances |
|||
Substance |
ΔHo (kJ/mol) f |
ΔGo (kJ/mol) f |
So (J/K·mol) |
CO(g) |
-110.5 |
-137.3 |
197.9 |
CO2(g) |
-393.5 |
-394.4 |
213.6 |
H2(g) |
0 |
0 |
131.0 |
H2O(l) |
-285.8 |
-237.2 |
69.9 |
O2(g) |
0 |
0 |
205.0 |
Organic Substances |
|||
CH4(g) |
-74.85 |
-50.8 |
186.2 |
Mg(s) |
0 |
0 |
32.5 |
MgO(s) |
-601.8 |
569.6 |
26.78 |
Table 1. Selected
*The ΔHof, ΔGof and S° values for ions are based on the reference states ΔHof (H+) = 0, ΔGof (H+) = 0, and S°(H+) = 0.
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