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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(b). Reduced van der Waals equation

Question

Deduce the reduced equation of state for a van der Waals gas and state its significance.

Answer in brief

(pᵣ+3/Vᵣ²)(3Vᵣ-1)=8Tᵣ.

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The full model answer

As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

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CoversReduced van der Waals equationCorresponding states

All parts of Question 13