Problem: Calculate AG° (in kJ/mol) for the following reaction at 1 atm and 25°CC2H6 (g) + O2 (g) → CO2 (g) H2O (l)ΔHf° C2H6 (g) = -84.7 kJ/mol; S° C2H6 (g) = 229.5 J/K • mol;ΔHf° CO2 (g) = 393.5 kJ/mol; S° CO2 (g) = 213.6 J/K • mol; ΔHf° H2O (l) = -285.8 kJ/mol; S° H2O (l) = 69.9 J/K • mol

FREE Expert Solution

We’re being asked to calculate AG° (in kJ/mol) for the following reaction at 1 atm and 25°C:


C2H6(g) + O2(g) → CO2(g) + H2O(l)


We can use the following equation to solve for ΔG˚rxn:


ΔG°rxn=ΔH°rxn-TΔS°rxn


For this problem, we need to do the following steps:

Step 1: Calculate ΔH˚rxn.

Step 2: Calculate ΔS˚rxn.

Step 3: Use ΔH˚rxn and ΔS˚rxn to calculate for ΔG˚rxn.


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Problem Details

Calculate AG° (in kJ/mol) for the following reaction at 1 atm and 25°C

C2H6 (g) + O2 (g) → CO2 (g) H2O (l)

ΔHf° C2H6 (g) = -84.7 kJ/mol; S° C2H6 (g) = 229.5 J/K • mol;

ΔHf° CO(g) = 393.5 kJ/mol; S° CO2 (g) = 213.6 J/K • mol; 

ΔHf° H2O (l) = -285.8 kJ/mol; S° H2O (l) = 69.9 J/K • mol

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