Chem Lab

Name: |Date:|
Exp 10: Caloric Content of Food||

Your Data:

|First Item|Second Item|Third Item|
What Food are you using||||
||||
Mass of empty beaker||||
Mass of beaker and water||||
Net Mass of the water||||
||||
Initial mass of food and holder||||
Final mass of burnt food and holder||||
Net Mass of the burnt food||||
||||
Initial temp of the water||||
Final temp of the water||||
∆ T in C (change in temperature)||||

Calculations: Show your numbers in the following calculation equations.

First Item_________________

Heat (q) gained by the water ____J q = ΔT x mass of the water x (4.184 J/g˚C )
Where ΔT = Tfinal – Tinitial of the water

Heat energy gained per gram of food ____J/g
Divide q determined above by the net mass of the food item

Convert J/g to Cal/g ____Cal/g
4.184 J = 1 cal 1000 cal = 1 Cal

Second Item_________________

Heat (q) gained by the water ____J q = ΔT x mass of the water x (4.184 J/g˚C )
Where ΔT = Tfinal – Tinitial of the water

Heat energy gained per gram of food ____J/g
Divide q determined above by the net mass of the food item

Convert J/g to Cal/g ____Cal/g
4.184 J = 1 cal 1000 cal = 1 Cal

Third Item_________________

Heat (q) gained by the water ____J q = ΔT x mass of the water x (4.184 J/g˚C )
Where ΔT = Tfinal – Tinitial of the water

Heat energy gained per gram of food ____J/g
Divide q determined above by the net mass of the food item

Convert J/g to Cal/g ____Cal/g
4.184 J = 1 cal 1000 cal = 1 Cal