WBJEE · Chemistry · Thermodynamics (C)
The condition for a reaction to occur spontaneously is
- A \(\Delta H\) must be negative
- B \(\Delta S\) must be negative
- C \((\Delta H-T \Delta S)\) must be negative
- D \((\Delta H+T \Delta S)\) must be negative
Answer & Solution
Correct Answer
(C) \((\Delta H-T \Delta S)\) must be negative
Step-by-step Solution
Detailed explanation
For a spontaneous reaction, \(\Delta G\) = negative and \(\Delta S=\) positive \[ \Delta G=\Delta H-T \Delta S=-v e \] Hence, \(\Delta H-T \Delta S=-\) ve only when \(\Delta S=+\) ve and \[ \Delta H=-v e \]
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