Energy measurements in food Lesson

0 Slides • 6 Questions

1

Multiple Choice

Which measurement is not required to calculate the energy in a food sample?

1

Mass of food

2

Temperature change

3

Volume of water

4

pH

2

Match

Look at this calorimeter and match the following differences that help improve the validity of the results.

Pure oxygen used.

Stirrer used

Copper coiled pipe

Food burned in an insulated container

All food is burnt – complete combustion – results more accurate

To evenly distribute the heat – make sure all the water is the same temperature

More Surface area - more heat transferred to the water

Not as much heat energy is lost –temperature reading more accurate

3

Multiple Select

What two factors should you control?

1

Volume/mass of water

2

Angle of tube

3

temperature

4

Distance of heat from tube

4

Multiple Choice

What is missing from this equation?

1

mass of food

2

temperature difference in °C

3

temperature difference

4

volume of water

5

Multiple Choice

What is missing from this equation?

1

mass of food

2

temperature difference in °C

3

temperature difference

4

volume of water

6

Multiple Choice

What is missing from this equation?

1

mass of food

2

Energy release in J

3

temperature difference

4

Energy release

Which measurement is not required to calculate the energy in a food sample?

1

Mass of food

2

Temperature change

3

Volume of water

4

pH

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MULTIPLE CHOICE

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