Are these past-paper questions?

No. The sets are original Chemistry Help questions built around A-level thermodynamics skills and common exam mistakes.

How are written thermodynamics explanations marked?

Numerical and structured parts are marked automatically. Longer explanations are self-marked against mark points that stay hidden until the student has written an answer.

Does the exam mode keep AQA and OCR A content separate?

Yes. AQA-only perfect-ionic-model work and lattice-convention flexibility are kept out of OCR A sets, while OCR A can directly assess the kinetic limitation of Gibbs feasibility predictions.

Year 13 · AQA & OCR A

Thermodynamics exam questions

Work through one linked mini-paper at a time. The numbers and contexts come from the thermodynamics skills on your course, so each question makes you decide what to calculate.

One context, several marks

Answer each part before you reveal its mark points. Numerical answers are marked automatically; longer explanations are self-marked against the mark points.

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Mark written answers after you commit

Type the answer you would put in the exam first. The mark points stay hidden until then, so you can check exactly what you wrote.

Your typed explanation is not saved to My Chemistry. Only the mark, skill, hints and question metadata are recorded when progress saving is available.