Which of the following involves the greatest heat transfer?
A)One gram of steam at 100°C changing to water at 100°C.
B)One gram of ice at 0°C changing to water at 0°C.
C)One gram of water cooling from 100°C to 0°C.
D)One gram of ice heating from −100°C to 0°C.

Question

Quizplus · Accepted Answer

The latent heat of vaporization, which is the heat required to change a substance from a liquid to a gas, is much greater than the specific heat capacity, which is the heat required to raise the temperature of a substance. Therefore, changing one gram of steam at 100°C to water at 100°C involves the greatest heat transfer because it involves a phase change and requires a large amount of heat to be absorbed.

Which of the Following Involves the Greatest Heat Transfer