Homework Help: Chemistry

Posted by Chemistry Chick on Thursday, November 17, 2011 at 11:51pm.

A candy sample is completely combusted in a bomb calorimeter. The calorimeter contains 982 g of water, and the measured temperature increase is 2.62°C. What is the fuel value of the candy sample in
nutritional Calories?

Chemistry - DrBob222, Friday, November 18, 2011 at 12:57am
q = mass x specific heat x (Tfinal-Tinitial)
q = 982 g x 1 cal/g x 2.62 = approximately 2,572.8 calories (the real kind of calorie). I would round that to 2.57E1 kilocalories. Since the nutritional calorie (the so-called Big calorie) = 1 kcal, the answer is 2.57 Cal.

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