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Question 17N.3.SL.TZ0.d

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Date November 2017 Marks available [Maximum mark: 2] Reference code 17N.3.SL.TZ0.d
Level SL Paper 3 Time zone TZ0
Command term Identify Question number d Adapted from N/A
d.
[Maximum mark: 2]
17N.3.SL.TZ0.d

A monatomic ideal gas is confined to a cylinder with volume 2.0 x 10–3 m3. The initial pressure of the gas is 100 kPa. The gas undergoes a three-step cycle. First, the gas pressure increases by a factor of five under constant volume. Then, the gas expands adiabatically to its initial pressure. Finally it is compressed at constant pressure to its initial volume.

Using your sketched graph in (b), identify the feature that shows that net work is done by the gas in this three-step cycle.

[2]

Markscheme

area enclosed

work is done by the gas during expansion

OR

work is done on the gas during compression

the area under the expansion is greater than the area under the compression

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