Using the psychrometric chart, find the specific volume if the dry-bulb temperature is 20 degrees C and the wet-bulb temperature is 15 degrees C.
a) 0.859 cubic metres / kg
b) 0.842 cubic metres / kg
c) 0.90 cubic metres / kg
d) 0.80 cubic metres / kg
e) 0.87 cubic metres / kg
Answer: A