Work Step by Step
Heating to melting point: $\Delta H=m.c.\Delta T=5.00\ g\times 0.235\ J/g.K\times (962-25)\ K=1101\ J=1.10\ kJ$ Melting: $\Delta H=m.h_f=5.00\ g\times 11.3\ kJ/mol\div 107.868\ g/mol=0.52\ kJ$ Total: $1.62\ kJ$
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