An ideal gas A and a real gas B have their volumes increased from V to 2V under isothermal conditions. The increase in internal energy (a) will be same in both A and B (b) will be zero in both the gases (c) of B will be more than that of A (d) of A will be more than that of B

Answer: (c). Ideal gas A: U depends only on T, so isothermal Δ U = 0. Real gas B: on expansion, work is done against intermolecular attraction, so its potential energy and hence U increases. So the answer is (c) increase of B is more than that of A.

An ideal gas A and a real gas B have their volumes increased from V… | NEET 1993 (AIPMT)

Q254NEET 1993 · AIPMTMedium

Thermodynamic Processes

An ideal gas $A$ and a real gas $B$ have their volumes increased from $V$ to $2V$ under isothermal conditions. The increase in internal energy

Show answer and solution

Answer: (c)

Ideal gas A: $U$ depends only on $T$ , so isothermal $\Delta U = 0$ .
Real gas B: on expansion, work is done against intermolecular attraction, so its potential energy and hence $U$ increases.
So the answer is (c) increase of B is more than that of A.

Report a mistake

Thermodynamic Processes question from NEET 1993 (AIPMT)

More questions on Thermodynamic Processes