Question

When does condensation occur? when a gas turns into a liquid when a liquid turns into a gas when a solid turns into a liquid when a gas turns into a solid

Answer 1

(a) when a gas turns into a liquid

Step-by-step explanation:

Condensation is the process of turning the gaseous form of a substance to its liquid form.

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Additional comment

Many condensation processes require a substrate onto which the liquid can form. If there is no substrate present, the gas may exist as "supercooled" vapor until a substrate is introduced.