In thermodynamic isobaric process (a) change in internal energy is zero (b) work done is zero (c) change in internal energy is not zero (d) heat supplied is zero

Answer: (c). At constant P, V ∝ T, so the temperature changes when the volume changes. Δ T ≠ 0 ⇒ Δ U ≠ 0; work PΔ V ≠ 0 and heat ≠ 0. So the answer is (c) change in internal energy is not zero.

In thermodynamic isobaric process | MHT CET 2026 (15 Apr, Shift 1)

Q5MHT CET 2026 · 15 APR · SHIFT 1Easy

Thermodynamic Processes

In thermodynamic isobaric process

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Answer: (c)

At constant $P$ , $V \propto T$ , so the temperature changes when the volume changes.
$\Delta T \neq 0 \Rightarrow \Delta U \neq 0$ ; work $P\Delta V \neq 0$ and heat $\neq 0$ .
So the answer is (c) change in internal energy is not zero.

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