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Thermodynamics — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThermodynamics1 Mark
MCQ
Which of the following process is non-spontaneous?
  • A
    Heat flow from hot end to cool end.
  • B
    Water flow from higher level to lower level.
  • ✓
    Gas flow from lower pressure region to higher pressure region.
  • D
    Gas flow from higher pressure region to lower pressure region.
✓

Answer

Correct option: C.
Gas flow from lower pressure region to higher pressure region.
Gas flowing from higher pressure region to lower pressure region is a natural process. Similarly, option $A$ and $B$ are natural.
Natural processes are spontaneous. Therefore, flow of gas from lower pressure to higher pressure region is non $-$ spontaneous.

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