Milk is being dried in a spray dryer. Ambient ait at $20C$ and $30\%RH$ is heated to $100C$ and $0\mathrm{.}03kg$ moisture$/$kg dry powder. If the enthalpy of milk powder is $119\mathrm{.}23k\frac{j}{k}g$ dry powder. What is the product temperature in $C?$

$[$ Tref $=0C,$ Cp milk powder $=3\mathrm{.}381k\frac{j}{k}g$ dry powder $C]$ water $=4\mathrm{.}187k\frac{j}{k}g$ water $($:$C$