InterviewSolution
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InterviewSolution
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Calculate `DeltaG^(Theta)` for the following reaction: `CO(g) +((1)/(2))O_(2)(g) rarr CO_(2)(g), DeltaH^(Theta) =- 282.84 kJ` Given, `S_(CO_(2))^(Theta)=213.8 J K^(-1) mol^(-1), S_(CO(g))^(Theta)= 197.9 J K^(-1) mol^(-1), S_(O_(2))^(Theta)=205.0 J K^(-1)mol^(-1)`, |
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Answer» `DeltaS^(Theta) = sum S^(Theta) ("products") -sumS^(Theta) ("reactants")` `=[S^(Theta)underset(CO_(2)).]-[S^(Theta)underset(CO).+(1)/(2)S^(Theta)underset(O_(2)).]` `= 213.8 - [197.9 +(1)/(2)205] =- 86.6 J K^(-1)` According to Gibbs-Helmholtz equation, `DeltaG^(Theta) = DeltaH^(Theta) - T DeltaS^(Theta)` `=- 282.84 - 298 xx (-86.6 xx 10^(-3))` `=- 282.84 +25.87` `=- 257.033 kJ` |
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