Using the psychrometric chart, find the specific humidity if the dry-bulb temperature is 25 degrees C and the wet-bulb temperature is 20 degrees C.
a) 0.12 kg of water vapour per kg of dry air
b) 0.012 kg of water vapour per kg of dry air
c) 0.0125 kg of water vapour per kg of dry air
d) 0.013 kg of water vapour per kg of dry air
e) 0.0115 kg of water vapour per kg of dry air
Answer: C