A mixture of gases expands at constant pressure from 1 MPa, 0.03 m3 to0.06 m3 with 84 kJ positive heat transfer. There is no work other thanthat done on a piston. Find DE for the gaseous mixture.(Ans. 54 kJ)The same mixture expands through the same state path while a stirringdevice does 21 kJ of work on the system. Find ? E, W, and Q for theprocess.