Look at these two nutrition labels

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Objective: Explain... How we calculate energy Where our body gets energy What ways our body uses energy.

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Presentation transcript:

Look at these two nutrition labels Warm-Up 3/17/14 Look at these two nutrition labels Compare them: What are some differences? similarities?

Debrief how Calories are determined in food. Agenda Objective Debrief how Calories are determined in food. Agenda Food Calorie Lab Debrief

Food Calorie Lab Debrief 1) Calculate ΔT 2) Use ΔT to calculate heat in joules from q = cmΔT Specific heat of water is 4.18 J/g.oC Mass is the volume of water you measured

Heat lost by food = Heat gained by water Soda Can Calorimeter Heat lost by food = Heat gained by water

Calculations Continued Make another chart with calculated heat (joules) for each food, Calories (Cal), and Calories per gram of food (Cal/g) 4.184 J = 1 cal 1000 cal = 1 Cal

Post-Lab Questions What foods did not burn? For the foods that did not burn, what happened to them? Why do you think that is? Which food had the greatest amount of Cal/g? How does this compare to your hypothesis? Was this surprising? Why?

Tutoring 4th Period – Rm. 401 5th Period – Rm. 402