Ten kmol per hour of air is throttled from upstream conditions of $25\backslash$deg C and $9\mathrm{.}5$ bar to a downstream pressure of $1\mathrm{.}2$ bar. Assume air to be an ideal gas with CP $=(7/2)$R$.$ Take R $=8\mathrm{.}314$ J$$mol$1$K$1.$

What is the downstream temperature? $($You must provide an answer before moving to the next part.$)$

The downstream temperature is

K$.$