The gas laws

1 mark · Easy

State the rule of pressure and temperature for a fixed mass of gas at constant volume.

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The pressure of a fixed mass of gas is directly proportional to its temperature (in kelvin) at constant volume.

Also accept: Pressure is directly proportional to temperature in kelvin at constant volume

Common mistakes: Mentioning Celsius or using incorrect variables

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Marking points

B1 · 1 mark · States direct proportionality between pressure and (absolute) temperature at constant volume

Worked solution

At constant volume, the pressure of a fixed mass of gas is directly proportional to its absolute temperature (in kelvin).