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Unformatted text preview: heat of fusion ( H fus ) Ice H fus = 6.01 kJ/mol The heat needed for the vaporization of a liquid is called the heat of vaporization ( H vap ) Water H vap = 40.67 kJ/mol Less energy is needed to allow molecules to move past each other than to separate them totally Vaporization requires the input of heat energy. Our bodies use this as a mechanism to remove excess heat from ourselves. We sweat, and its evaporation requires heat input (the excess heat from ourselves). Refrigerators use the evaporation of Freon (CCl 2 F 2 ) to remove heat inside the fridge. The Freon is condensed outside the cabinet (usually in coils at the back) in a process which releases heat energy (the coils will be warm)...
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