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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 · 2020 · Mains Paper II

Q7(a). Thermodynamic parameters from emf

Question

Derive expressions for ΔᵣG, ΔᵣS and ΔᵣH of a galvanic-cell reaction from emf measurements.

Answer in brief

ΔᵣG=-nFE, ΔᵣS=nF(∂ E/∂ T)ₚ and ΔᵣH=-nF[E-T(∂ E/∂ T)ₚ].

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CoversThermodynamic parameters from emfElectrochemistry

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