MCQ
What is the melting point of benzene if $\Delta {H_{fusion}}\, = \,9.95\,kJ/mol$ and $\Delta {S_{fusion}}\, = \,35.7\,J/K-mol$ ?
- A$278.7\,^oC$
- ✓$278.7\,\,K$
- C$300\,\,K$
- D$298\,\,K$
✓
Answer
Correct option: B.
$278.7\,\,K$
b
$\Delta S _{\text {fusion }}=\frac{\Delta H _{\text {fusion }}}{ T }$
$\Delta S _{\text {fusion }}=\frac{\Delta H _{\text {fusion }}}{ T }$
$T =\frac{\Delta H }{\Delta S }=\frac{9.95 \times 1000}{35.7}=278\, K$
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