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December 21, 2014

Homework Help: Chemistry

Posted by Anonymous on Sunday, November 11, 2012 at 12:32am.

CFCs, or chlorofluorocarbons,were once used as refrigerants, but were banned due to their role in the depletion of ozone in our upper atmosphere. The evaporation of CFCs can be used to drive the freezing of liquid water. Given the heat of vaporization for one such CFC is 289 J/g, how many grams of liquid water at 25.0 degrees Celsius (oC) could be frozen at 0.0 oC when 52.0 g of the CFC evaporates at its boiling point?

Useful constants
specific heat of ice: 2.09 J/goC
specific heat of water: 4.18 J/goC
specific heat of steam: 1.84 J/goC
water's heat of fusion: 334 J/g
water's heat of vaporization: 2260 J/g

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