What is the temperature at which a liquid changes to a gas called?

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Study for the Cambridge Science – States of Matter Test. Prepare with flashcards and multiple choice questions, with hints and explanations for each question. Ready yourself for your exam!

Multiple Choice

What is the temperature at which a liquid changes to a gas called?

Explanation:
Boiling point. This is the temperature at which a liquid has enough energy for molecules to break free and form a gas, causing bubbles to appear throughout the liquid and the phase change to occur. Melting point is the temperature for a solid turning into a liquid, not a liquid to gas. Water vapour and steam describe the gaseous form of water, not the temperature at which the change happens. At standard atmospheric pressure, water boils at 100°C, but the exact boiling temperature shifts with pressure.

Boiling point. This is the temperature at which a liquid has enough energy for molecules to break free and form a gas, causing bubbles to appear throughout the liquid and the phase change to occur. Melting point is the temperature for a solid turning into a liquid, not a liquid to gas. Water vapour and steam describe the gaseous form of water, not the temperature at which the change happens. At standard atmospheric pressure, water boils at 100°C, but the exact boiling temperature shifts with pressure.

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