Determine the exergy, in kJ, of the contents of a 1.5m^3 storage tank, if the tank is filled with
a) air as an ideal gas at 440 degrees Celsius and 0.7 bar
b) water vapor at 440 degrees Celsius and 0.7 bar

Ignore effects of motion and gravity and let Tnought = 22 degrees Celsius, p nought = 1 bar