In one of your rigorous workout sessions, you lost 290 g of water through evapor

Question

In one of your rigorous workout sessions, you lost 290 g of water through evaporation. Assume that the amount of work done by your body was 3.2 105 J and that the heat required to evaporate the water came from your body. (a) Find the loss in internal energy of your body (due to evaporating water only), assuming the latent heat of vaporization is 2.42 106 J/kg. (b) Determine the minimum number of food calories that must be consumed to replace the internal energy lost (1 food calorie = 4186 J). food calories

Explanation / Answer

loss in internal energy of your body (due to evaporating water only), assuming the latent heat of vaporization is 2.42 106 J/kg = 0.290*2.42106 = 0.702174 J the minimum number of food calories= loss in internal energy /4186= 1.6772e-4

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