The human body generates heat by the metabolism of cabohydrates and other food materials. Metabolism provides energy for all biological activities (e.g. muscle contractions). The metabolic processes also generates heat, and there are special cells in the body whose main function is heat generation. Now let us assume that our friend Joe BlueHen ingests 1 L of ice, which he allows to melt in his mounth before swallowing?
a. How much energy is required to melt the ice and warm the water to the body temperature?
b. If 1 g of fat when metabolized releases approximately 42 kJ of energy, how much fat will Joe burn by ingesting the water?
c. Suppose that, instead of ice, Joe drank 1 L of water at 0°C. How would the answers to parts (a) and (b) change?