Which of the following would release the most heat? Assume the same mass of in e

Question

Which of the following would release the most heat? Assume the same mass of in each case. Specific heats of ice, liquid water, and water vapor are 2.05 J/(g°C), 4.18 J/(g°C), and 2.01 J/(g°C) respectively, the heat of fusion of ice is 6.01 kJ/mol, the heat of vaporization of water is 40.7 kJ/mol.

A. Heating the H2O sample from –25°C to 70.°C.

B. Cooling the H2O sample from 13°C to –2.6°C.

C. Cooling the H2O sample from 95°C to 74°C.

D. Cooling the H2O sample from 140°C to 110°C.

E. Cooling the H2O sample from 106°C to 88.0°C.

Explanation / Answer

answer = option

because it this case

first vapour must cool up to 1000C from 106

next convert vapour to water at 1000C

third water cooled from 1000C to 88.00C

so large amount of heat will release in this case.

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