HW\#9: Solve the problem (from Sandler) ILLUSTRATION 3.4-3 Use of Mass and Energy Balances with an Ideal Gas A compressed-air tank is to be repressurized to 40 bar by being connected to a high-pressure line containing air at 50 bar and 20C. The repressurization of the tank occurs so quickly that the process can be assumed to be adiabatic; also, there is no heat transfer from the air to the tank. For this illustration, assume air to be an ideal gas with CV=21J/(molK). a. If the tank initially contains air at 1 bar and 20C, what will be the temperature of the air in the tank at the end of the filling process? b. After a sufficiently long period of time, the gas in the tank is found to be at room temperature (20C) because of heat exchange with the tank and the atmosphere. What is the new pressure of air in the tank