A-LevelChemistryStates of matter9701/12 · Oct/Nov 2014 · Q41 Mark
Two glass vessels M and N are connected by a closed valve. [Figure: Diagram showing two connected vessels M and N, separated by a valve.] M contains helium at 20°C at a pressure of 1 × 10⁵ Pa. N has been evacuated, and has three times the volume of M. In an experiment, the valve is opened and the temperature of the whole apparatus is raised to 100°C. What is the final pressure in the system?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A3.18 × 10⁴ Pa
B4.24 × 10⁴ Pa
C1.25 × 10⁵ Pa
D5.09 × 10⁵ Pa
✓ Correct answer
A: 3.18 × 10⁴ Pa
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