Air at 50% relative humidity is cooled isobarically at I atm absolute from 90°C to 25°C.

(a) Estimate the dew point and degrees of superheat of the air at 90°C.

(b) How much water condenses (mol) per cubic meter of feed gas?

(c) Suppose a sample of the 90°C air is put in a closed variable-volume chamber containing a mirror and the pressure is raised at constant temperature until a mist forms on the mirror, At what pressure (atm) would the mist form? (Assume ideal gas behavior.)