Question

When crystals of a grey solid are heated, a purple gas forms. When the gas cools, it returns to a grey crystalline solid. Analyze whether a physical or chemical change occurred. Give reasons for your answer.

Answer 1

Answer:

Explanation:

On slowly heating the crystalline solid, its temperature will increase. The particles absorb heat, its movement increases, the bonds break and then go into the liquid state. During the melting of the solid to liquid, energy is absorbed therefore it is an endothermic process