2.40. One kilogram of air is heated reversibly at constant pressure from an initial state of 300 K and 1 bar until its volume triples. Calculate W, Q, AU, and

AH for the process.Assume for air that PV/T= 83.14 bar-cm³-mol^-1.K^-1 and Cp = 29 J-mol^-1.K^-1.