A-LevelChemistryStates of matter9701/12 · Oct/Nov 2017 · Q51 Mark

A sample of an ideal gas is contained at a constant temperature of 300 K in a gas syringe. The pressure is increased and a graph of pV/RT against pressure is plotted. Which graph correctly represents the results?

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A[Graph A: pV/RT starts high, decreases, then increases linearly with p, crossing C and B]

B[Graph B: pV/RT starts low, decreases slightly, then increases linearly with p, below A]

C[Graph C: pV/RT is a horizontal line at 1, for all p]

D[Graph D: pV/RT decreases non-linearly with p]

✓ Correct answer

C: [Graph C: pV/RT is a horizontal line at 1, for all p]

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Topic: States of matter, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 2, question 5.

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