A technician seals a sample of gaseous argon in a high-pressure cryogenic cylinder. The mass of the gaseous argon is 0.35 kg0.35\text{ kg}0.35 kg.
The cylinder is cooled until all of the argon condenses into liquid argon.
State the mass of the liquid argon produced inside the cylinder.
Explain your answer to part (a)(i).
Describe one key difference between a physical change (such as condensation) and a chemical change.
27 exam-style questions on OCR GCSE Physics Changes of state. Each one has a worked solution and a mark scheme showing where the marks go.