Boyle's law
1 mark · EasyState what happens to the pressure of a fixed mass of gas if its volume is halved at constant temperature.
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The pressure doubles.
Also accept: It doubles.; The pressure becomes twice as large.
Common mistakes: Saying pressure is unchanged
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Marking points
B1 · 1 mark · Correct statement that pressure doubles when volume is halved
Worked solution
According to Boyle's law, pressure and volume are inversely proportional at constant temperature. So if the volume halves, the pressure doubles.