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The pressure at a phase change is constant so we can change the formula deltaS=q/T to deltaH/T. You then plug in the delta H fusion of water and divide it by the temperature given (298.15 K). You then need to multiply this number by the number of moles (1.00) to fix the units.
Using the equation ∆S=q/T, we can substitute ∆Hº for q, and the the appendix provides the value for that variable. Because the given ∆Hº is per mole, multiply the numerator by the number of moles in the sample to then produce the correct value. Hopefully this will give you a good jumping off point to start the problem!
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