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An ice cube tray contains enough water at 22.0 ˚C to make 18 ice cubes that each has a mass of 30.0 g. The tray is placed in a freezer that uses CF_{2}Cl_{2} as a refrigerant. The heat of vaporization of CF_{2}Cl_{2} is 158 J/g. What mass of CF _{2}Cl_{2} must be vaporized in the refrigeration cycle to convert all the water at 22.0 ˚C to ice at -5.0 ˚C? The heat capacities for H_{2}O _{(s)} and H_{2}O _{(l)} are 2.03 J/g • ˚C and 4.18 J/g • ˚C, respectively, and the enthalpy of fusion for ice is 6.02 kJ/mol.

Heating and Cooling Curves

Heating and Cooling Curves

Heating and Cooling Curves

Heating and Cooling Curves