Answer
$-3.8\frac{KJ}{K}$
Work Step by Step
We know that $0^{\circ}C=0+273=273K$
We can find the change in entropy as
$\Delta S=\frac{\Delta Q}{T}$
We plug in the known values to obtain:
$\Delta S=\frac{-1035.4}{273}$
$\Delta S=-3.8\frac{KJ}{K}$