Work done in an isobaric (constant-pressure) process (15-4)

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Question

Constant pressure of the system
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Review

The volume of a cylinder is equal to the area of its base multiplied by its height. So \(A\ell_{\mathrm{i}}\) and \(A\ell_{\mathrm{f}}\) are, respectively, the initial volume \(V_{\mathrm{i}}\) and final volume \(V_{\mathrm{f}}\) occupied by the gas, and we can rewrite Equation 15-3 as

(15-1) \(\ \ \ \ Q = \Delta{U} + W\)

It’s conventional to rearrange this equation with \(\Delta{U}\) on one side and \(Q\) and \(W\) on the other side: