Question

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.

Answer 1

Answer:

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