$6.$

$(811$ point$)$ The vapor pressure of phenylhydrazine has been found to be $($from $25C$ to $($:$240C\}$

$lo{g}_{10}{p}^{**}=7\mathrm{.}9046-\frac{2366\mathrm{.}4}{(T+230)}$

$,$ where $p^{**}$ is in atm and $T$ is in $C.$ What is the heat of vaporization of phenylhydrazine in Btu$/$lb$-$mol at $366\mathrm{.}7$ K$?$ Use the Clausius$-$Clapeyron equation