Question Constellation Sign up for free AQA · GCSE · Combined Science · Higher
Air energy and temperature change
Figure 12 shows a device that uses a mug of hot coffee to turn a wheel. The air in the chamber is heated.
The mass of air in the chamber is constant.
What property of air allows a small change in internal energy to cause a large temperature change to the air in the chamber?
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Marking points
- 1 State that air has a low specific heat capacity.
Full-mark answer
Air has a low specific heat capacity.
Why this answer loses marks
High specific heat capacity.
A high specific heat capacity would mean a larger energy change is needed for the same temperature change; the credited property is low specific heat capacity.