If 3000 ft3 of air is crossing an evaporator coil and is cooled from 75 degree Fahrenheit to 55 degree Fahrenheit what would be the volume of air in ft3 exiting the evaporator coil?

Assuming the air behaves ideally, there is no change in the volume of air passing through the evaporator coil during the cooling process. Therefore, the volume of air exiting the evaporator coil would also be 3000 ft3.