Air at $1$atm is blown past the bulb of mercury thermometer. The bulb is covered with a wick. The wick is immersed in an organic liquid of molecular weight $58.$ The reading of thermometer is $7\mathrm{.}6C.$ At this temperature, the vapour pressure of the liquid is $5$kPa. Find the air temperature, given that the ratio of heat transfer cocfficient to mass transfer coefficient $($psychrometric ratio$)$ is $2k\frac{J}{k}g.K$ and the latent heat of vaporization of liquid is $360k\frac{J}{k}g.$ Assume that the air, which is blown is free from the organic vapour.