Question #55346

A researcher studying the nutritional value of a new candy places a 6.10-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.80 °C. If the heat capacity of the calorimeter is 30.60 kJ·K–1, how many nutritional Calories are there per gram of the candy?

Expert's answer

1 Cal = 1 kcal = 4.1868 kJ

Q = C_{calorimeter} × ΔT;

C_{candy} = Q/m = C_{calorimeter} × ΔT/m = 30.60 kJ K^{-1} × 2.80 K/6.10 g = 14.0 kJ/g = 3.35 kcal/g = 3.35 Cal/g

Answer 3.35 Cal/g

Q = C

C

Answer 3.35 Cal/g

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