Pressure of water vapour is given by

\frac{0.622 P _{v}}{P _{b} - P _{v}}

\frac{μ}{1 - ( 1 - μ ) \frac{P _{s}}{P _{b}}}

\frac{P _{v} ( P _{b} - P _{d} )}{P _{d} ( P _{b} - P _{v} )}

None of these

Answer

Answer: Option D

Answer: Option D

Solution:

Pressure of water vapour is given by,

l n (\frac{P _{1}}{P _{2}}) = (\frac{Δ Hvap}{R}) (\frac{1}{T _{2}} - \frac{1}{T _{1}})