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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper II covers chemistry.

UPSC Combined Geo-Scientist, Prelims · 2022 · Paper II, Chemistry · Q60 of 120

Geo-Scientist Prelims 2022 Chemistry Q60: The change in the Gibbs free energy (ΔG) at constant pressure (p)…

QuestionThermodynamics / Gibbs-Helmholtz equation

The change in the Gibbs free energy (ΔG) at constant pressure (p) in a certain process is −83·7 kJ at 32 °C and −80·7 kJ at 42 °C. The value of the change in enthalpy of the process at 37 °C is

  1. (a) −148·0 kJ
  2. (b) −82·2 kJ
  3. (c) +175·2 kJ
  4. (d) −175·2 kJ

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