Chemical Engineering - Mass Transfer - Discussion

Only option a should be correct.

Sensible cooling involves cooling a substance without changing its phase (e.g., from liquid to gas). During this process, the temperature decreases, but the moisture content (specific humidity) remains unchanged.

Specific humidity: This is the mass of water vapour per unit mass of dry air. It remains constant as long as there is no addition or removal of moisture from the air.

The Partial pressure of vapour: This is the pressure exerted by the water vapour in a mixture of gases. It will decrease during sensible cooling as the temperature decreases, leading to a decrease in the vapour pressure

The sensible cooling of air is the process in which only the sensible heat of the air is removed so as to reduce its temperature, and there is no change in the moisture content (kg/kg of dry air) of the air.

Can anyone explain me the term "sensible cooling"?

Heat transfer without phase change.

How? Explain.

How?