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Q.

Identify the correct statement regarding a spontaneous process :

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a

Exothermic processes are always spontaneous.

b

Lowering of energy in the reaction process is the only criterion for spontaneity.

c

For a spontaneous process in an isolated system; the change in entropy is positive.

d

Endothermic processes are never spontaneous.

answer is C.

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Detailed Solution

Entropy change is considered as positive, when the process is spontaneous. In case of non-spontaneous processes it is considered as negative

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Identify the correct statement regarding a spontaneous process :