A serving of Grape-Nuts cereal (6.55 g) is burned in a bomb calorimeter with a heat capacity of 41.88 kJ/°C. During the combustion, the temperature of the water in the calorimeter increased by 2.35°C. Calculate the energy content (in kJ/g) of Grape-Nuts.

Question

Chemistry

Micah Whitney

21 August, 07:03

A serving of Grape-Nuts cereal (6.55 g) is burned in a bomb calorimeter with a heat capacity of 41.88 kJ/°C. During the combustion, the temperature of the water in the calorimeter increased by 2.35°C. Calculate the energy content (in kJ/g) of Grape-Nuts.

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Answers (1)

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Serenity Nash · Answer 1

C = 15.03 kj / g

Explanation:

Mass of cereal = 6.55 g

Heat capacity = 41.88 Kj / °C

Change in temperature = 2.35 °C

Energy = ?

Solution:

Energy content = specific heat capacity * change in temperature / mass

C = c. ΔT/m

C = 41.88 Kj / °C * 2.35 °C / 6.55 g

C = 98.42 kj / 6.55 g

C = 15.03 kj / g