U4AOS2 - Energy Content of Foods

Question 1

Balanced Cellular Respiration Formula

Answer 1

Question 2

Purpose of Calorimetry

Answer 2

To determine the amount of heat energy transferred in a system

Question 3

Calibration Factor (theory)

Answer 3

Joules/Kilojoules of energy required to raise the temperature of the calorimeter by one degree

(measured in J °C-1 or kJ °C-1)

Question 4

Finding the Calibration Factor

Answer 4

a known amount of energy will be delivered to the water, and the rise in temperature will be recorded

Question 5

Calibration Graphs (where is Delta T)

Answer 5

Question 6

Will the energy content metabolized by the body be equal to the energy content released through combustion

Answer 6

No:
- not all components of food that undergo combustion e.g. cellulose can be digested by the body - therefore less energy would be available
- also - not all food ingested (that could be digested) is actually digested - so it will provided less energy than in a calorimeter