One mole of h,0 is cooled from 25°c to 0°c and frozen. all the heat is delivered to a second mole of h, o initially at 25°c, heating it to 100°c. the refrigerating machine is operating at maximum theoretical efficiency (no entropy created) (a) how much work must be done by the refrigerator? (b) what fraction of the second mole is converted to steam at 100 c? (the heat capacity of water is 18 cal/mole degree: the heat of vaporization at 100°c is 9730 calmole; the heat of fusion at 0°c is 1438 cal/mole.)