calorie of the chips

Question

Suppose you burn a 2.4 g sample of potato chips. You use the heat given off from that process to heat 34.3 g of water from 16.3 ^oC to 21.7 ^oC. What is the caloric value (in kcal/g) of the potato chips?

Answer 1

Here is how you solve it

Heat absorbed by water =. 34.3 g x 5.4 ^oC x 1.00 calorie/g. ^oC. =. 185.22 cal. ( 0.18522 Kcals)

caloric value of potato chips =. Kcal/grams of potato chips. =. 0.18522/2.4 g. = 0.077 Kcal/g