Question

One tablespoon of cookie dough has a mass of 12.99 g
. It is combusted in a calorimeter whose heat capacity is 72.49 kJ/∘C
. The temperature of the calorimeter rises from 21.84 ∘C
to 25.23 ∘C
. Find the food caloric content of the cookie dough in Calories per gram

Answer 1

The calorific value of the tablespoon of cookie dough is 58.7 Calories per gram.

We have the following information from the question;

Mass of the cookie dough =  12.99 g

Heat capacity of the calorimeter = 72.49 kJ/∘C

Temperature rise = 25.23 ∘C - 21.84 ∘C = 3.39∘C

H =  12.99 g × 72.49 × 10^3J/∘C ×  3.39∘C

H = 3.19 × 10^6 J or 762.4 Cal

1 g produces 762.4 Cal/ 12.99 g = 58.7 Calories per gram

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