OCR A Level Physics B (Advancing Physics)
OCR A Level Physics B (Advancing Physics) Matter: Hot or Cold Exam Questions
Free OCR A Level Physics B (Advancing Physics) exam questions on Matter: Hot or Cold, with mark schemes. Covers the Boltzmann factor, activation energy, thermal energy and specific heat capacity.
Matter: Hot or Cold exam questions
These packs of real past exam questions cover the whole of Module 5: Rise and Fall of the Clockwork Universe, including Matter: Hot or Cold. Work through every question on this sub-topic, then mark your answers against the mark scheme.
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A Level Physics Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About OCR A Level Physics B (Advancing Physics) Matter: Hot or Cold
This sub-topic covers energy at the molecular scale.
What you need to know
- Boltzmann factor e^(−E/kT) and its meaning.
- Activation processes Reaction rates and evaporation.
- Heat capacity Specific heat capacity measurements.
- Thermal equilibrium Energy sharing between particles.
Common mistakes in Matter: Hot or Cold
- Forgetting E and kT must be in the same units.
- Misinterpreting a small Boltzmann factor.
Try three Matter: Hot or Cold exam-style questions
1. Find the Boltzmann factor for E = 0.50 eV at 300 K. (2 marks)
Show the mark scheme answer
kT = 0.026 eV (1); e^(−19.3) ≈ 4 x 10⁻⁹ (1).
2. Explain why rates rise steeply with temperature. (1 mark)
Show the mark scheme answer
The Boltzmann factor increases rapidly as T rises.
3. Define specific heat capacity. (1 mark)
Show the mark scheme answer
Energy to raise 1 kg by 1 K.
Matter: Hot or Cold FAQs
What does this cover?
The Boltzmann factor and thermal properties.
Which practical links here?
Measuring specific heat capacity.
What is kT?
A typical thermal energy of a particle.
Revise this topic with flashcards: A Level Physics Flashcards, with mark scheme answers for Anki and Quizlet.
