Moist air at 24°C, 1 atm, and 50% relative humidity enters an evaporative cooling unit operating at steady state consisting of a heating section followed by a soaked pad evaporative cooler operating adiabatically. The air passing through the heating section is heated to 45°C. Next, the air passes through a soaked pad exiting with 50% relative humidity.

A. Determine the humidity ratio of the entering moist air mixture, in kg(vapor) per kg(dry air).

B. Determine the rate of heat transfer to the moist air passing through the heating section, in kJ per kg of mixture.

C. Determine the temperature, in °C, exit of the evaporative cooling section.