A-LevelChemistryStates of matterOct/Nov 2016Paper 1 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.
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The correct answer is C. This question tests the candidate's understanding of states of matter within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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