A-LevelChemistryStates of matter9701/12 · Oct/Nov 2016 · Q81 Mark

In an experiment, a sample of a pure gas is put into a gas syringe at a temperature of 300K and pressure of 16kPa. The gas is compressed until the volume occupied by the gas is halved. After compression, the temperature of the gas in the syringe is 375K and the pressure is 40 kPa. Which statement is correct?

AIntermolecular forces between the gas molecules are significant.

BIt is possible to calculate the number of moles of gas present using these data alone.

CThe gas is behaving ideally.

DThe pressures used are too high for ideal gas behaviour.

✓ Correct answer

C: The gas is behaving ideally.

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Topic: States of matter, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2016 Paper 1 Variant 2, question 8.

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