JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
A process will be spontaneous at all temperatures if
- A \(\Delta H < 0\) and \(\Delta S < 0\)
- B \(\Delta H < 0\) and \(\Delta S > 0\)
- C \(\Delta H > 0\) and \(\Delta S > 0\)
- D \(\Delta H > 0\) and \(\Delta S < 0\)
Answer & Solution
Correct Answer
(B) \(\Delta H < 0\) and \(\Delta S > 0\)
Step-by-step Solution
Detailed explanation
At constant \(P\) and \(T\) and for the process to be spontaneous we should have \(\Delta G = -ve\) and we know that \(\Delta G = \Delta H - T\Delta S\) If \(\Delta H = -ve\) and \(\Delta S = +ve\) then at all the temperature the process will be spontaneous.
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