FRQ — Formative Reinforcement Topics

Long answer·Standard multi-step (3/5)·Calculator allowed

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 flexible container has

1.5

mol of gas at

300\,\mathrm{K}

and

2.0\,\mathrm{bar}

. The volume is

18.7\,\mathrm{L}

. The gas is warmed to

360\,\mathrm{K}

while pressure is kept

2.0\,\mathrm{bar}

Total: 4 marks

(a) State which gas-law relation is enough for the volume change. (1 mark)

(b) Find the new volume. (2 marks)

Your response (optional — you can also work on paper)

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