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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper II covers physical chemistry.

UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper II

Q6(a). Pressure and equilibrium constant

Question

Why does pressure not affect the equilibrium constant of a gas-phase reaction at fixed temperature?

Answer in brief

The thermodynamic constant is fixed by ΔᵣG°(T); pressure changes equilibrium composition to satisfy that same constant.

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CoversPressureequilibrium constantChemical equilibrium

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