11th Class Chemistry Thermodynamics

  • question_answer 91)   Assertion (A): Spontaneous process is an irreversible process and may be reversed by some external agency. Reason (R): Decrease in enthalpy is a contributory factor for spontaneity.

    Answer:

      (b) Spontaneous processes are irreversible in nature. We know,\[\Delta G=\Delta H-T\Delta S;\,\,\,\Delta G\] must be negative for spontaneous process. Hence decrease in enthalpy will contribute to the condition for spontaneity.


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