Chapter 5, Problem 5.117P

Interpretation Introduction

Interpretation:

The total amount of heat lost in calories when 5.75 g of water vapor at 120° is cooled to -20° C should be calculated.

Concept Introduction:

For the conversion of vapor at 120.0°C to water vapor at 100°C, there exist five stages. First is the changing the temperature of vapor to its boiling point (100°C), second is the phase transition of vapor to liquid water, third is the cooling the liquid to its freezing point (0°C), the fourth is the phase transition liquid water to ice and the fifth is the cooling of the ice to -20°C.