Question

Is it possible to liquefy CO₂ gas at 50⁰C? Give a reason.

Answer 1

Critical temperature: It is the temperature above which a gas cannot be liquefied whatever pressure may apply.

Liquefication means the conversion of the state of a substance from gas to liquid by applying temperature and pressure.

• The critical temperature of Carbon dioxide (CO₂) is 31.1⁰C.
• 50⁰C is greater than the critical temperature (31.1⁰C) of CO₂ so It cannot get liquified at 50⁰C.

Therefore, it is not possible to liquefy CO₂ gas at 50⁰C.