Sublimation is the process in which a substance changes from a solid directly into a...

Sublimation is the process in which a substance changes from a solid directly into a gas without passing through the liquid phase. Among the options you provided:

A) Ice (H2O) can undergo sublimation, but this typically occurs at very low pressures and temperatures far below what is found in Earth's atmosphere. In normal atmospheric conditions, ice melts to form liquid water before evaporating into a gas.

B) Sulphur (S) can sublime at certain conditions. When heated, solid sulfur can turn directly into a gas without becoming a liquid first. This sublimation process can occur at temperatures above its melting point and under reduced pressure.

C) Phosphorus (P) can also sublime under certain conditions, similar to sulfur. It can change from a solid to a gas without passing through the liquid phase when heated and under reduced pressure.

D) Iodine (I2) is known for its sublimation properties. It readily sublimes at room temperature and atmospheric pressure, transitioning from a solid to a purple vapor.

E) Potassium iodide (KI) is a compound, not an element. Compounds typically do not sublime like pure elements. Instead, they undergo processes like melting or decomposition when heated.

So, the substances that would sublime on exposure to the atmosphere are B) Sulphur, C) Phosphorus, and D) Iodine.?

In Chemistry
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Asked by Holland on 4th September, 2023