Plot heat capacity vs the natural log of temperature (lnT) for the two phases on separate graphs.

Draw smooth curves through the two sets of points. Draw isotherms at 23 K and 273 K on the solid graph and at 273 K and the maximum temperature in Part B on the liquid graph. Measure the area under each curve (counting squares).

Calculate the molar entropy in each case. These values are the molar entropy changes of steps 2 and 4 of the overall process associated with the entropy of water.