1. Tardigrade
  2. Question
  3. Chemistry
  4. Assertion: An exothermic process which is nonspontaneous at high temperature may become spontaneous at low temperature. Reason: Spontaneous process is an irreversible process and may be reversed by some external agency.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Assertion : An exothermic process which is nonspontaneous at high temperature may become spontaneous at low temperature.
Reason : Spontaneous process is an irreversible process and may be reversed by some external agency.

Thermodynamics

Solution:

$\Delta G = \Delta H - T\Delta S$
For exothermic process, $\Delta H = - ve$. For $\Delta G$ to be $-ve$ (fo spontaneous process), $\Delta H > T\Delta S$ which is possible only at low temperature.