I have two problems and i need help please.. First one: A mass of 0.05KG of the air is heated at constant pressure of 2 bar until the volume is occupied is 0.0658 m^3. Calculate the supplied heat and the workdone if the initially temperature of the air is 130 C.?

The second and the last one: 1 KG of nitrogen is compressed reversibly and isothermally from 1.01 bar, 20 C to 4.2 bar. Calculate the workdone and the heat Flow during the process Assuming nitrogen to be a perfect gas and molar mass 28kg/kmol