The pressure, dry bulb temperature and relative humidity

Home » Refrigeration and Air-conditioning » Refrigeration and Air-conditioning Miscellaneous » Question

The pressure, dry bulb temperature and relative humidity of air in a room are 1 bar, 30°C and 70%, respectively. If the saturated steam pressure at 30°C is 4.25 kPa, the specific humidity of the room air in kg of water vapour/kg dry air is

1. 0.0083
2. 0.0101
3. 0.0191
4. 0.0232

Correct Option: C

RH = 0.7 =	P_v	and w =	0.622p_v
	4.25		100 - p_v