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Indian Forest Service (Mains)

Chemistry optional

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

Paper I covers physical and inorganic chemistry.

Indian Forest Service (Mains), Chemistry optional · 2023 · Paper I

Q4(a). Translational entropy of nitrogen

Question

Assuming N₂(g) is behaving ideally at 25 °C and 1 bar pressure, calculate the translational contribution to entropy (S°ₘ) of this gas.

Answer in brief

The translational contribution is approximately 150.4 J mol⁻¹ K⁻¹ at 298.15 K and 1 bar.

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Topic notes: statistical thermodynamics, the Boltzmann distribution, partition functions and the Sackur–Tetrode equation, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversSackur–Tetrode equationtranslational entropypartition functionstatistical thermodynamicsnitrogen

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