Answer to Question #141893 in General Chemistry for Gray

Question

A researcher studying the nutritional value of a new candy places a 3.90 g sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.90 ∘C. If the heat capacity of the calorimeter is 42.20 kJ⋅K−1, how many nutritional Calories are there per gram of the candy?

Answer 1

Energy per gram of the candy= (42.20×1000JK^-1×2.90K)/(3.90g) = 31379.5J per gram = 7507 calories per gram=7.507 kilocalories per gram