Joe is getting his energy expenditure measured by direct calimetry. The 1 liter of water surrounding the chamber has an initial reading of 15 degrees Celsius. The final reading is 2,015 degrees Celsius. How many kilocalies did he expend?

Question

Quizplus · Accepted Answer

Direct calorimetry measures the amount of heat produced by the body, which can be converted into energy expenditure. The increase in water temperature surrounding the chamber indicates the amount of heat produced. Since the temperature increased by 2,000 degrees Celsius (from 15 to 2,015 degrees) and 1 liter of water requires 1 kilocalorie (kcal) to increase 1 degree Celsius, Joe expended 2,000 kilocalories.

Joe Is Getting His Energy Expenditure Measured by Direct Calimetry