Heat energy required to change 1 kg of a liquid to gas at atmospheric pressure at its boiling point is called latent heat of __________.

fusion

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vaporization

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freezing

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melting

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Solution

The correct option is A vaporization
When water converts to steam, particles absorb extra energy in the form of latent heat of vaporization. 'Latent' means hidden. Latent heat of vaporization is defined as heat energy required to change 1 kg of a liquid to gas at atmospheric pressure at its boiling point.

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