Chemistry II
posted by Mary .
Calculate the energy pulled from 500 grams of Water at 20.0 degrees Celsius to Ice at 0.0 degrees Celsius.
What happens to the energy?
How much Freon11 must circulate through the freezer in order to freeze the 500 gram sample of Water?

Chemistry II 
DrBob222
q1 = heat to move water from 20C to zero C.
q1 = mass H2O x specific heat water x (TfinalTinitial).
q2 = heat to freeze 20 g H2O at zero C to ice at zero C.
q2 = mass water x heat fusion.
qtotal = q1 + q2.
qtotal = mass freon x heat vaporization if we assume 100% efficiency.
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