aQle.

$1-)$ Consider the reduction of uronium tetrafluoside by

calcium, in accordonce with the following reaction.

$U{F}_4+2Ca=U+2Ca{F}_2,H_{298}^0=-440kJ$

The heat of fusion of calcium fluoride $(Ca{F}_2)$ is $2970$

kJmole$-1$

and the heat of fusion of uronium is $12\mathrm{.}55kJmol{e}^{-1}.$ Assuming

an adiabatic system and toking the average heatcapacity

as $7$cal g atom$-1deg{K}^{-1},$ calculate the expected temperature to which the system would rise as a result of

the reaction