Answer to Question #259109 in Physics for qtkosako

Question

A sophomore with nothing better to do adds heat to 0.350 kg of ice at until it is all melted. What is the change in entropy of the water?

Answer 1

The change in energy due to melting:

$$\delta Q=m\lambda=0.350(3.36·10^5)=117600\text{ J}.$$

The change in entropy:

$$\Delta S=\delta Q/T=117600/273=431\text{ J/K}.$$