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heat of fusion
the amount of energy required to change a substance from the solid phase to the liquid phase at its melting point
the temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid
heat of vaporization
the amount of energy required for the liquid at its boiling point to become a gas
the ability of a fluid (liquid or gas) to exert an upward force on an object immersed in it
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