Your roommate has learned that burning approximately 3,500 food calories (Problem 7.3) results in a weight loss of 1 lbm, and he gets the bright idea of losing weight rapidly by eating ice. His theory is that the energy expended by the body in melting the ice and raising the resulting liquid water to body temperature will do the trick. You burst the poor boy's bubble by telling him the amount of ice he would have to consume. How much ice would be required per pound of weight lost?