Determine the amount of food energy(kJ) of 81.89g of sweet peas if they contain 0.8% fat, 3.2% protein, 8% c..

carbohydrates. Using this info,


Fuel value kJ/g


17 carbs


38 fat


17 protein

Determine the amount of food energy(kJ) of 81.89g of sweet peas if they contain 0.8% fat, 3.2% protein, 8% c..
%26gt; Fat: 1 gram = 9 calories Protein: 1 gram = 4 calories Carbohydrates: 1 gram = 4 calories





%26gt; 1 calorie = 4.184 joules





so fat = 81.89 x 0.008 0.66g x 9cal = 5.94 cals


= 0.66g





protein = 81.89 x 0.032 2.62g x 4cal = 10.48 cals


= 2.62g





carbs = 81.89 x 0.08 7.9g x 4cal = 31.6 cals


= 7.9g





31.6 + 10.48 + 5.94 = 48.02 calories total





48.02cals x 4.184 joules = 200.9 Joules total





1000 joules = 1 kj ---%26gt; so 200.9 joules = Aprox 0.2 kj





So fuel value would be 0.2Kj/g





*Its late so I dont know if I did this right but I tried my best =)

kung fu