The amount of energy required to change one gram of a liquid,at its boiling point,to a gas is called its heat of

Question

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The amount of energy required to change one gram of a liquid at its boiling point to a gas is called its heat of vaporization. Choice A, fusion, refers to the amount of energy required to change one gram of a solid at its melting point to a liquid. Choice B, freezing, refers to the amount of energy released when one gram of a liquid at its freezing point changes to a solid. Choice D, sublimation, refers to the amount of energy required to change one gram of a solid at its sublimation point to a gas without passing through the liquid phase.

The Amount of Energy Required to Change One Gram of a Liquid,at