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)?
(a) 1.05 kCal = 4.40 MJ
(b) 0.24 MJ melting and warming
(c) 4.16 MJ net body gain
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