Q111 · CSIR-NET Chemistry, December 2014
Paper: CSIR-NET December 2014 · Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Thermodynamics – General · Marks: 2 · Difficulty: Easy
At high pressure, the fugacity coefficient of a real gas is greater than one, because
(a)Attractive term overweighs the repulsive term
(b)Repulsive term overweighs the attractive term
(c)Repulsive term is equal to the attractive term
(d)The system is independent of both the attractive and repulsive terms
Answer
Answer: B ✓ checked by 4AB · confidence high
Explanation
At high pressure the molecules are forced close together, repulsions dominate, Z > 1 and φ = f/p > 1.
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