I don't understand this problem. What is the different between filled rapidly and filled slowly? I think in c, when it's filled slowly, the temperature would stay the same at T= 280 K but what's about a and b. How can I do those? Any hint, please. Oh, and here is the problem Oxygen gas at T- 280 K and atmospheric pressure is used to fill in an oxygen tank in Cesna 210 aircraft. The oxygen cylinder has a volumn of 11.4 liters and the oxygen pressure when the tank is full is at 122 atmosphere. If the tank is filled rapidly, the oxygen is compressed adiabatically. In this case, a, how much oxygen fills the tank? b, what is the final temperature of oxygen at the instant the tank is filled c, If the tank is filled slowly and isothermally, how much oxygen (in kg) is required to fill the tank? Thanks a lot!