# Chem Lab

Topics: Energy, Heat, Thermodynamics Pages: 2 (279 words) Published: April 8, 2013
Name: |Date:|
Exp 10: Caloric Content of Food||

|First Item|Second Item|Third Item|
What Food are you using||||
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Mass of empty beaker||||
Mass of beaker and water||||
Net Mass of the water||||
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Initial mass of food and holder||||
Final mass of burnt food and holder||||
Net Mass of the burnt food||||
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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
Conclusion: