Which involves a larger number of calories?
A)the condensation of 1 gram of steam at 100°C to water at 100°C
B)the cooling of 1 gram of water at 100 degrees Celsius to 1 gram of ice at absolute zero
C)both the same
D)none of these

Question

Quizplus · Accepted Answer

The condensation of 1 gram of steam at 100°C to water at 100°C involves the release of the latent heat of vaporization, which is significantly larger (about 540 calories per gram for water) than the amount of heat removed to cool water from 100°C to 0°C and then freeze it to ice at 0°C, plus the additional cooling to absolute zero.

Which Involves a Larger Number of Calories