Question

The gas inside a flexible container (e.g., a balloon) is allowed to expand against a constant external pressure of 2.3 bar until the volume increases from 2.5 L to 7.8 L. Calculate the amount of work done on the system.

Answer 1

\[W=P \Delta V\]
You can just plug everything in, but convert bar to atm for this equation (2.3 bar = 2.27 atm).

W = (2.27)(7.8 - 2.5) = +12.03 J of work done on the system.