A piston-cylinder assembly contains 0.1 lb of propane. The propane expands from an initial state where p1 5 60 lbf/in.2 and T1 5 30F to a final state...

A piston–cylinder assembly contains 0.1 lb of propane.The propane expands from an initial state where p1 5 60 lbf/in.2and T1 5 30°F to a final state where p2 5 10 lbf/in.2 Duringthe process, the pressure and specific volume are relatedby py2 5 constant. Determine the energy transfer by work,in Btu.