Ice Cream, When Eaten, Gives About 2100

Short Answer

Ice cream, when eaten, gives about 2100. Calories/kg to the body. On the other hand, the body must give back energy to warm it up to body temperature (37°C). Assuming ice cream has similar thermal properties to water:
(a) 1/2 kg produces how much energy?
(b) 1/2 kg absorbs how much energy to reach 37°C?
(c) What is the net gain or loss (eating 1/2 kg ice cream)?