First slide

Thermodynamic processes

Question

An ideal gas undergoes a four step cycle as shown in the P – V diagram below. During this cycle, heat is absorbed by the gas in

Moderate

A

steps 1 and 2
B

steps 1 and 3
C

steps 1 and 4
D

steps 2 and 4

Solution

$\to$ in the path (1) volume of an ideal gas is increasing at constant pressure.
$∵ V \propto T = dQ$ is +ve (absorbed)
In the path (4) pressure of an ideal gas is increasing at constant volume $∵ P \propto T = dQ$ is +ve (absorbed)

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