-If a kilogram of air at 20°C (68°F)has a specific humidity of 7.5 g/kg,the relative humidity is
A)25%.
B)50%.
C)75%.
D)100%.

Question

-If a kilogram of air at 20°C (68°F)has a specific humidity of 7.5 g/kg,the relative humidity is
A)25%. 
B)50%. 
C)75%. 
D)100%.

Quizplus · Accepted Answer

Relative humidity is the ratio of the current specific humidity to the maximum specific humidity (saturation) at the same temperature. At 20°C, the saturation specific humidity is approximately 15 g/kg. Therefore, 7.5 g/kg is 50% of 15 g/kg.

-If a Kilogram of Air at 20°C (68°F)has a Specific