Question

At $0^{o}C$, if enthalpy of vapourisation of ice is 40.65 $kJ/mol$. the molar entropy change for melting of ice at $0^{o}C$ is $kJ/mol$.

Answer 1

Change in entropy for a phase transformation is given as:
$△S_{transformation}=\frac{△H_{transformation}}{T}$

putting all the values from question we get:

$△S_{fusion}=\frac{△H_{fusion}}{T}$

$△S_{fusion}=\frac{40.65}{273}$

$△S_{fusion}=0.148kJ/mol$