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