Answer
279 K
Work Step by Step
We find:
$\Delta S_{fus}=\frac{\Delta H_{fus}}{T_{m}}\implies T_{m}=\frac{\Delta H_{fus}}{\Delta S_{fus}}$
$=\frac{9.95\times10^{3}\,J/mol}{35.7 \,J/K\cdot mol }=279\,K$
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