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Constants Heat of fusion (?Hfus) is used for calculations involving a phase change between solid and liquid,...

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Chemistry

Constants

Heat of fusion (?Hfus) is used for calculationsinvolving a phase change between solid and liquid, with notemperature change. For H2O, ?Hfus=6.02 kJ/mol.

Specific heat capacity (C) is used for calculationsthat involve a temperature change, but no phase change. For liquidwater, C=4.184 J/(g??C).

Heat of vaporization (?Hvap) is used for calculationsinvolving a phase change between liquid and gas, with notemperature change. For H2O, ?Hvap=40.7 kJ/mol.

Part B

How much heat is required to raise the temperature of 92.0g ofwater from its melting point to its boiling point?

Express your answer numerically in kilojoules.

Answer & Explanation Solved by verified expert
4.1 Ratings (623 Votes)
Clearly here no phase change is involved We just need to increase the temperature of 920 g water from 0 degC melting pt to 100 degC boiling pt So the amount of heat reqd final temp initial temp x    See Answer
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