Question

Using the information below, determine the amount of food energy (kJ) of 72.53 g of hamburger...

Using the information below, determine the amount of food energy (kJ) of 72.53 g of hamburger if it contains 39.00% fat, 26.00% protein, 22.00% carbohydrates.
Species

Fuel value, kJ/g


Carbohydrate 17.00

Fat 38.00

Protein 17.00

Science   Chemistry   
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Homework Answers

Answer #1

Fuel value, kJ/g


Carbohydrate 17.00

Fat 38.00

Protein 17.00

First calculate the amount of fat, protein and carbohydrate in 72.53 g of hamburger:

Fat = 39.00% 72.53 g= 28.29 g

Protein = 26.00% 72.53 g= 18.86 g

Carbohydrate = 22.00% 72.53 g= 15.96 g

Then calculate the amount of food energy (kJ) as follows:

Fat = 28.29 g * 38.00 KJ/ g

= 1075.02 KJ

Protein = 18.86 g * 17.00 KJ/ g

= 320.62 KJ

Carbohydrate   = 15.96 g * 17.00 KJ/ g

= 271.32 KJ

Total food energy (kJ)= 1075.02+ 320.62 +271.32] KJ

=1666.96 KJ

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