Paper: CSIR-NET June 2014 · Subject: Physical Chemistry · Chapter: Thermodynamics · Topic: Thermodynamics – General · Marks: 2 · Difficulty: Medium
Under review — part of this question (a structure or an option) is not clear in the source scan. 4AB is checking it against the original book; the answer shown may change.
The figure below represents the path followed by a gas during expansion from $\mathrm{A} \rightarrow \mathrm{B}$. The work done is (L atm)
(a)0
(b)9
(c)5
(d)4
Answer
Under review — not yet confirmed.
Answer: D
Explanation
The gas is first cooled at constant volume (no work) and then expands at 1 atm from 1 L to 5 L: w = pΔV = 1 × 4 = 4 L atm.