Q2: A tank of nitrogen gas at atmospheric pressure and temperature 27 C occupies a volume of 100 lit. If its temperature increases to 77 C, calculate: 1. The number of moles in the tank. 2. The mass of nitrogen in the tank. 3. The change in the internal energy of the gas. 4. The change in the gas volume assuming the pressure is constant. 5. The work done by the gas during expansion 6. The change in the gas enthalpy.