The work done by a gas in an isobaric expansion from $V_1$ to $V_2$ at pressure $P$ is:
Solution
$W = \int P\,dV = P(V_2-V_1)$ when $P$ is constant.
About this question
Subject: Physics · Chapter: Thermodynamics · Topic: Thermodynamic Processes
This question is part of PrepWiser's free JEE Main question bank. 15 more solved questions on Thermodynamics are available — start with the harder ones if your accuracy is >70%.