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

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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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