Calculate the standard free-energy changes for the following reactions at 25°C.2MgO(s) → 2Mg(s) + O2(g) Inorganic SubstancesSubstanceΔHo (kJ/mol)fΔGo (kJ/mol)fSo (J/K·mol)CO(g)-110.5-137.3197.9CO2(g)-393.5-394.4213.6H2(g)00131.0H2O(l)-285.8-237.269.9O2(g)00205.0Organic SubstancesCH4(g)-74.85-50.8186.2Mg(s)0032.5MgO(s)-601.8569.626.78Table 1. Selected Thermodynamic Data at 1 atm and 25°C**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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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Calculate the standard free-energy changes for the following reactions at 25°C.

2MgO_(s) → 2Mg_(s) + O_2(g)

Inorganic Substances
Substance	ΔH^o (kJ/mol) f	ΔG^o (kJ/mol) f	S^o (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 Thermodynamic Data at 1 atm and 25°C*

*The ΔH^of, ΔG^of and S° values for ions are based on the reference states ΔH^of (H+) = 0, ΔG^of (H+) = 0, and S°(H+) = 0.

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