Are these past-paper questions?

No. The sets are original Chemistry Help questions built around A-level thermodynamics skills and recurring examiner-reported mistakes.

How are written thermodynamics explanations marked?

Numerical and structured parts are marked automatically. Longer explanations are self-marked against explicit 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 are generated from the thermodynamics skills on your course, so you have to decide what to calculate instead of matching a memorised question.

One context, several marks

Answer each part before you reveal its mark points. Numerical answers are marked automatically; longer explanations are self-marked against explicit 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 the chemistry you actually wrote rather than the answer you had in your head.

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