Consider the following reaction: 2Ca(s) + O_2(g) rightarrow 2CaO(s) Delta H_rxn = -1269.8 kJ; Delta S_rxn...

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Answer 1

Answer #1

Expression for free energy $\Delta G$ can be written as follows:

AH-TAS

Substitute values of -1269.8 kJ for $\Delta H$ , -0.3646 kJ/K for $\Delta S$ and (28+273) K for .

$\Delta G$ = (-1269.8 kJ ) - (28+273) K(-0.3646 kJ/K)

$\Delta G$ = -1160.1 kJ

Therefore, change in free energy is -1160.1 kJ

Nonspontaneous reaction have positive $\Delta G$ and spontaneous reaction have negative $\Delta G$ .

Since, $\Delta G$ of given reaction is negative. The reaction is spontaneous.

Answer 2

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