2. Calculate AG° from standard enthalpy of formation and standard molar entropy values and predict whether the following reactions is spontaneous or not, at 25 °C. А. H2(g) + CO2(g) H2O(g) + CO(g) AHf (kJ/mol) S° (J/mol.K) 130.6 H2(g) CO2(g) H2O(g) -393.5 -241.8 213.6 188.8 -110.5 197.9 B. Fe2O3(e) + 3H2(g) 2Fe(9) + 3H2O(g) AH (kJ/mol) -822.2 S° (J/mol.K) 90.0 Fe2O3(s) H2(g) Fe(s) H2O(g) 130.6| 27.2 -241.8 188.8
2. Calculate ΔG° from standard enthalpy of formation and standard molar entropy values and predict whether the following reactions is spontaneous or not, at 25 °C.
A. H2(g) + CO2(g) H2O(g) + CO(g)
ΔHf° (kJ/mol) S° (J/mol.K)
H2(g) 0 130.6
CO2(g) -393.5 213.6
H2O(g) -241.8 188.8
CO(g) -110.5 197.9
B. Fe2O3(s) + 3H2(g) 2Fe(s) + 3H2O(g)
ΔHf° (kJ/mol) S° (J/mol.K)
Fe2O3(s) -822.2 90.0
H2(g) 0 130.6
Fe(s) 0 27.2
H2O(g) -241.8 188.8
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