Q. A tank of volume v = 13m3 contains N2 at T1 = 290k and P1 = 600kPa. Some N2 leaks out of the tank and the pressure thus drops to P2 = 400 kPa. At that stage the temperature is found to be T2 = 288K .
Find the mass of N2 that has leaked. Assume that N2 can be treated as an ideal gas. The molar mass of N2 is M = 28 g/mole and R = 8.314 J/mole K.