The critical temperature (Tc) and critical pressure (pc) of CO2 are and 73 atm respectively. Can CO2 (g) be liquefied at and 80 atm pressure?
The given critical temperature and pressure of gas are and 73 atm respectively. This suggests that gas cannot be liquified above and 73 atm however high temperature and pressure may be applied on gas. Hence, gas cannot be liquified at and 80 atm.