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# Calculate Gibbs Free Energy of a Reaction

CHEM-E8USPU

What is the standard Gibbs free energy of reaction for the conversion of ozone to oxygen according to the following equation: $2O_{3} \rightarrow 3O_{2}$?

Use the values in the table below.

Substance $\Delta H^{\circ}_{f} \space(J/mol)$ $S^{\circ}\space (J/mol K)$
$O_{2}$ $0$ $205.0$
$O_{3}$ $143$ $238.82$
A

$-326.9 \space kJ$

B

$-323.5 \space kJ$

C

$-4.122 \times 10^{4} \space kJ$

D

$-143.9 \space kJ$