NEET 2016 Chemistry question

The correct thermodynamic conditions for the spontaneous reaction at all temperatures is:

(1) and
(2) and
(3) and Correct
(4) and

Answer: (3)

Solution

A reaction is spontaneous when . For this to hold at every temperature, must be negative and must also be negative, i.e. and , option (3). (2) gives at all temperatures (never spontaneous); (4) is spontaneous only

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Question ID VK-091898