Calculate the standard free-energy changes for the following reactions at 25°C. CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) 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 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.
Calculate the standard free-energy changes for the following reactions at 25°C. CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) 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 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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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.
CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)
|
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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