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Question

For the reaction at 25,X2O4O4(l)2XO2(g).
ΔH=2.1 kcal and ΔS=20 cal K1. The reaction would be:

A
spontaneous
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B
non-spontaneous
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C
at equilibrium
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D
unpredictable
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Solution

The correct option is A spontaneous
By considering 2 things i.e if reaction is exothermic or endothermic we can justify if reaction is spontaneous or not. If, ΔG is negative then reaction is said to be spontaneous. Now, ΔG =ΔH-ΔS. Therefore, ΔG will be negative, hence it is a spontaneous reaction.

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