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Question 20N.3.SL.TZ0.16d

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Date November 2020 Marks available [Maximum mark: 2] Reference code 20N.3.SL.TZ0.16d
Level SL Paper 3 Time zone TZ0
Command term Explain Question number d Adapted from N/A
d.
[Maximum mark: 2]
20N.3.SL.TZ0.16d
(d)

The apparatus used to measure energy content of food contains some water. Explain how this water is used when measuring the energy content of a food.

[2]

Markscheme

a. the volume/mass of water is measured;

b. the energy from the burning food raises the temperature/heats the water;

c. knowing the specific heat of water allows energy of the food to be calculated
OR
4.2J of heat energy causes a 1°C rise in 1g of water;

Examiners report

Stronger candidates could explain how water is used in a calorimeter. Many candidates suggested burning the food in the water and others answered all they knew about calorimeters without answering the question directly.

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