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CUET · CHEMISTRY · PYQ PAPER 2023

\(\Delta G = \Delta H – T\Delta S\)
When \(\Delta H = -ve\) and \(\Delta S = -ve\), then the value of \(\Delta G\) will :

  1. A always remain + ve
  2. B always remain – ve
  3. C become – ve at lower temperature
  4. D become – ve at higher temperature
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Answer & Solution

Correct Answer

(A) always remain + ve

Step-by-step Solution

Detailed explanation

\(\Delta G = \Delta H - T\Delta S\) \(\Delta G = (-ve) - T(-ve)\) \(\Delta G = (-ve) + T(positive)\) When \(T\) is low, \(|\Delta H| > |T\Delta S|\), so \(\Delta G\) becomes \(-ve\). When \(T\) is high, \(|\Delta H| \(\Delta G\) will become \(-ve\) at lower temperature.
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