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Forum: Chemistry :: Chemical Principles :: Quantization/Transfer of Energy  New Topic
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mst10 Energy Fri 30 Oct 2009 12:24:00 PM
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Joined Tues 6 Oct 2009
Posts 196

 An ice cube tray contains enough water at 22.0 degrees Celsius to make ice cubes of each mass of 30.0 g. the tray is placed in a freezer that uses  CF2Cl2 as a refrigerant. The heat of vaporization of  CF2Cl2

is 158 J /g. what mass of CF2Cl2 must be vaporized in the refrigeration cycle to convert all the water at 22.0 degrees Celsius to ice at -5.0 degrees Celsius? The heat capacities for H2O(s) and H2O (l) are 2.03 J/g and 4.18 J/g respectively and the enthalpy of fusion for ice is 6.02 kJ/mol.


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mst10 Fri 30 Oct 2009 12:25:00 PM
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Joined Tues 6 Oct 2009
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