Problem: Using data from Appendix 4, calculate ΔH°, ΔS°, and ΔG° for the following reactions that produce acetic acid:Which reaction would you choose as a commercial method for producing acetic acid (CH 3CO2H) at standard conditions? What temperature conditions would you choose for the reaction? Assume ΔH° and ΔS° do not depend on temperature.

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Reaction 1:


ΔH°rxn=ΔH°f, prod-ΔH°f, react

ΔH°rxn=(1 mol CH3COOH)-484 kJ1 mol CH3COOH           -(1 mol CH4)-75 kJ1 mol CH4+(1 mol CO2)(-393.5 kJ1 mol CO2)

ΔH˚rxn = –15.5 kJ/mol


ΔG°rxn=G°f, prod-G°f, react

ΔG°rxn=(1 mol CH3COOH)-389 kJ1 mol CH3COOH           -(1 mol CH4)-51 kJ1 mol CH4+(1 mol CO2)(-394 kJ1 mol CO2)

ΔG˚rxn = 56 kJ/mol


ΔS°rxn=S°f, prod-S°f, react

ΔS°rxn=1 mol CH3COOH160 Jmol·K           -1 mol CH4186 Jmol·K+1 mol CO2214mol·K

ΔS˚rxn = –240 J/mol • K


Reaction 2:

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Problem Details

Using data from Appendix 4, calculate ΔH°, ΔS°, and ΔG° for the following reactions that produce acetic acid:

Which reaction would you choose as a commercial method for producing acetic acid (CH 3CO2H) at standard conditions? What temperature conditions would you choose for the reaction? Assume ΔH° and ΔS° do not depend on temperature.

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