Question

Solid $C{O}_2$ is used as a refrigerant.

• A. True
• B. False

Answer 1

The correct option is A

True

Solid $C{O}_2$ is also known as Dry ice.

Have you seen the artificial clouds in movies?

It is noting but Dry ice (solid $C{O}_2$)

Dry $C{O}_2$ gas is pressurized at 50-60 atm and refrigerated between $-{57}^{\circ }Cand+{30}^{\circ }C$ until it liquefies. Next the pressure is reduced to (~35) atm. As a result some liquid $C{O}_2$vapourises, causing a rapid lowering of the temperature of the remaining liquid. As a result, extreme cold causes liquid to solidify into a snow-like consistency. Finally, the snow-like $C{O}_2$ is compressed into either small pellets or larger block of dry ice.

$\Rightarrow$ It is used as a refrigerant