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Q.

For the reaction, $C O (g) + \frac{1}{2} O_{2} (g) \to C O_{2} (g)$ at 300 K. Calculate the standard Gibbs free energy change is $- X$ , when the standard Gibbs energies of formation for $C O_{2} and C O are - 394 and - 137 k J m o l^{- 1},$ respectively, the value of $X$ is____

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answer is 257.

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Detailed Solution

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$Δ G °_{reaction} = \sum G °_{(f)} products - \sum G °_{(f)} reactants Δ G °_{reaction} = - 394 - ((- 137) + 0) = - 257$ $[Ans = 257]$

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