A gas is compressed at constant temperature (400 K) from P=1 bar to P=5 bar. The gas is described by the following equation of state: vP=RT+aP^3. With a = 0.0102667 L/atm^2 mol. The heat capacity at constant pressure of the ideal gas at 400K is 3.85 R.
a) Get an expression for (dU/dP)T in terms of measurable properties.
b) Find delta U for the process.