Indian Forest Service (Mains), Chemistry optional · 2024 · Paper I
Q8(a). Equal mean speeds of oxygen and hydrogen
Question
Calculate the temperature at which the average velocity of oxygen equals that of hydrogen at 20 K.
Answer in brief
Interpreting “average velocity” as mean molecular speed, T(O₂) = 320 K using molar masses 32 and 2 g/mol.
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The full model answer
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Coversaverage speedMaxwell distributionkinetic theory of gasesmean molecular speedoxygen hydrogen speed
All parts of Question 8
- 8(a) Equal mean speeds of oxygen and hydrogen10 marks
- 8(b) Critical compressibility of a van der Waals gas10 marks
- 8(c) Entropy comparison of neon and argon10 marks
- 8(d) Colour centres in sodium chloride10 marks