4.65 A system consisting of 5 kg of air is initially at 300 kPaand 20 degrees C. Determine the heat transfer necessary to (a)increase the volume by a factor of two at constant pressure, (b)increase the pressure by a factor of two at constant volume, (c)increase the pressure by a factor of two at constant temperature,and (d) increase the absolute temperature by a factor of 2 atconstant pressure.
