Question

state the properties and uses of dry ice
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Answer 1

Properties of dry ice :-

When dry ice exchanges its latent cold with its surroundings, it changes from a solid into a gas without going through the liquid state: this transformation process is known as sublimation. Every kilogram of dry ice generates 136 kilofrigories when it sublimates. The resulting gas is at a temperature of –78.5 ºC; in addition, this gas gives off 14-16 extra frigories, so it is possible to obtain up to 152 kilofrigories for every kilogram of Dry Ice.

Uses of dry ice:-

The most common use of dry ice is to preserve food, using non-cyclic refrigeration. It is frequently used to package items that must remain cold or frozen, such as ice cream or biological samples, without the use of mechanical cooling.

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