Answer
$11.21\frac{KJ}{K}$
Work Step by Step
We know that $100^{\circ}C=100+273=373K$
We can find the change in entropy as
$\Delta S=\frac{\Delta Q}{T}$
We plug in the known values to obtain:
$\Delta S=\frac{4181}{373}$
$\Delta S=11.21\frac{KJ}{K}$