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Q.

The reaction;

4Ag(s)+O2(g)⟶2Ag2O(s), is exothermic.

Which statement about the reaction is correct ?

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a

It is spontaneous only at high temperatures

b

It is spontaneous only-at low temperatures

c

It is non-spontaneous at all temperatures

d

It is spontaneous at all temperatures.

answer is B.

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Detailed Solution

For exothermic reaction we know that,

ΔS<0,ΔH<0;ΔG∘=ΔH∘−TΔS∘

By this we can say that the given reaction is spontaneous only-at low temperature.

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