The enthalpy of moist air is the total heat content of a mixture of dry air and water vapor. It is expressed in British thermal units (Btu) per pound of dry air.

In general, mass-basis calculations are more accurate than volume-basis calculations. This is because the mass of a substance is constant, while the volume of a substance can change with temperature and pressure.

When air temperature increases, the molecules in the air move faster and collide with each other more often. This creates more heat energy. When air moisture content increases, the water vapor molecules in the air also move faster and collide with each other more often. This also creates more heat energy.

warmer air can hold more water vapor than cooler air.  Molecules in warm air have more energy and can therefore hold more water vapor.

As the water on the wick evaporates, it absorbs heat from the thermometer, causing the temperature to drop.

As temperature increases, air molecules gain kinetic energy which increases their ability to hold water vapor

The wet-bulb depression is a measure of the humidity of the air. It is the difference between the wet-bulb temperature and the dry-bulb temperature. The higher the humidity, the closer the wet-bulb temperature will be to the dry-bulb temperature. Greater the wet-bulb depression lower will be the Relative Humidity

Yes, the dew point is the temperature at which the air becomes saturated with water vapor. When the dew point is high, it means that the air is holding a lot of water vapor.

A 10°F rise in air temperature can decrease relative humidity by 5 to 10%. This is because the amount of water vapor that air can hold increases with temperature.

When the air is saturated dry bulb temperature is equal to the wet bulb temperature. , At this point, air cannot absorb any more water vapor, and therefore, evaporation cannot occur.