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The chlorofluorocarbon ccl2f2 was once used as a refrigerant. what mass of this substance must evaporate to freeze 2 mol water initially at 20°c? (δhvap for ccl2f2 is 289 j/g; δhfus for solid ice i

The chlorofluorocarbon ccl2f2 was once used as a refrigerant. what mass of this substance must evaporate to freeze 2 mol water initially at 20°c? (δhvap for ccl2f2 is 289 j/g; δhfus for solid ice is 6.02 kj/mol; specific heat capacity for liquid water is 4.184 j/g•°c)

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