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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 · 2018 · Mains Paper II

Q13(a). Thermal energy of oxygen

Question

Calculate the average internal energy per molecule of oxygen at 300 K using equipartition.

Answer in brief

The room-temperature translational plus rotational energy is 5/2kBT=1.035×10⁻²⁰ J per molecule.

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CoversThermal energy of oxygenEquipartition

All parts of Question 13