Question

What is critical temperature in metals

Answer 1

Explanation:

Critical temperature means the highest temperature at which it is possible to separate substances into two different phases (vapour and liquid). For steel the critical temperature is slightly higher which is around 1600–2300 degree Fahrenheit.

Answer 2

Carbon dioxide cannot be liquefied above 31.2 °C

Explanation:

The temperature above which a substance can not be liquefied from its vapor state, no matter whatever is the pressure applied, is called critical temperature.  Or

Critical temperature is the temperature above which a gas can not be liquefied by application of pressure.

Example: Carbon dioxide cannot be liquefied above 31.2 °C