$1\mathrm{.}1$ Moist air exists at $22C$ dry$-$bulb temperature with $50\%RH$ at sea level $(101\mathrm{.}325$

kPa $)$

Calculate the following:

$($a$)$ the humidity ratio, $w$

$($b$)$ dew point temperature, $T_{\text{d}\text{e}\text{w}}$

$($c$)$ enthalpy, $h$

$($d$)$ specific volume, $v$

$1\mathrm{.}2$ Using the psychrometric chart supplied, determine the following and where

applicable, compare the results obtained in $(1\mathrm{.}1)$ above:

$($a$)$ the humidity ratio, w

$($b$)$ dew point temperature, $T_{\text{d}\text{e}\text{w}}$

$($c$)$ enthalpy, $h$

$($d$)$ specific volume, $v$

$($e$)$ wet$-$bulb temperature, $T_{wb}$

$5$ marks for showing values on the p$-$h diagram & $4$ for comparison