We’re being asked to determine the caloric content fructose contributes to the apple.
The caloric content of food is determined from its enthalpy of combustion per gram, as measured in a bomb calorimeter.
The ΔHcomb described in joules (or kilojoules) are negative for all substances that can be burned. In contrast, the caloric content of a food is always expressed as a positive number because it is stored energy. So,
We will solve the problem by converting the enthalpy of combustion to calorie and determine the contribution of the fructose.
The heat of combustion of fructose, C6 H12 O6, is -2812 kJ/mol.
If a fresh golden delicious apple weighing 4.26 oz (121 g ) contains 17.0 g of fructose, what caloric content does the fructose contribute to the apple?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Thermochemical Equation concept. You can view video lessons to learn Thermochemical Equation. Or if you need more Thermochemical Equation practice, you can also practice Thermochemical Equation practice problems.