A small oxygen cylinder is being filled from a much larger tank. The initial temperature and pressure of the small cylinder are 300 k and 10 bar, respectively. The large tank's temperature and pressure are 300 K and 100 bar; they remain essentially constant during the filling process. The filling operation terminates when the pressure in the small tank has reached 80 bar. If the filling is done rapidly, calculate the final temperature in the small cylinder,
(a) assume that oxygen is an ideal gas with Cv= 5R/2 and
(b) using accurate thermodynamic data for oxygen.