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Question 800009
JEE Chemistry · Medium

Chemical Thermodynamics and Thermochemistry: Spontaneity cases MCQ

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Spontaneity casesMediumQuestion 800009

Question

A reaction with ΔH < 0 and ΔS > 0 is:
  1. A
    Spontaneous at all temperatures
    Correct
  2. B
    Non-spontaneous
  3. C
    Spontaneous only at low T
  4. D
    Spontaneous only at high T

Correct answer

Spontaneous at all temperatures

Explanation

ΔG = ΔH − TΔS. If ΔH < 0 and ΔS > 0: ΔG = (−) − T(+) = always negative (−) at any T > 0. Spontaneous at all temperatures.

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