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5. Thermodynamics and thermochemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry5. Thermodynamics and thermochemistry1 Mark
MCQ
Which of the following conditions will always lead to a non-spontaneous change
  • A
    Positive $\Delta H$ and positive $\Delta S$
  • B
    Negative $\Delta H$ and negative $\Delta S$
  • ✓
    Positive $\Delta H$ and negative $\Delta S$
  • D
    Negative $\Delta H$ and positive $\Delta S$
✓

Answer

Correct option: C.
Positive $\Delta H$ and negative $\Delta S$
(c)When $\Delta H = + ve$ and $\Delta S = - ve$ reaction is non-spontaneous.

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