# Entropy change

## Homework Statement

a.) What is the entropy change of a 12.8 g ice cube that melts completely in a bucket of water whose temperature is just above the freezing point of water?

b.) What is the entropy change of a 18.1 g spoonful of water that evaporates completely on a hot plate whose temperature is slightly above the boiling point of water

## Homework Equations

deltaS=Q/T
Q=nCv$$\DeltaT$$

## The Attempt at a Solution

deltaS=m*c*ln(Tf/Ti) but i dont know what Tf or Ti should be

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