31. IE •• Phase changes require energy in the form of latent heat (Chapter 11).

(a) If 1 kg of ice at 0 °C is converted to water at 0 °C, will the water have (1) more, (2) the same, or (3) less mass compared to the ice? Why?

(b) What is the difference in mass between the ice and the water?

Would this difference be detectable?