Psychrometry and Grain Drying

Specific humidity (humidity ratio $\omega$) of moist air at total barometric pressure $P$ and partial water vapor pressure $P_v$ is given by:

Options:

• (A) $\omega = 0.622 \frac{P_v}{P - P_v}$
• (B) $\omega = 0.622 \frac{P - P_v}{P_v}$
• (C) $\omega = \frac{P_v}{P}$
• (D) $\omega = 1.61 \frac{P_v}{P - P_v}$