Case study·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
A sealed rigid cylinder contains oxygen gas at . It is heated uniformly to without changing its volume.
Total: 4 marks
(a) By what factor does average translational kinetic energy per molecule change? (1 mark)
(b) By what factor does rms speed change? (1 mark)
(c) By what factor does pressure change? (1 mark)
(d) Give the molecular reason for the pressure change. (1 mark)
Something wrong with this item?