Fixed activation energy
What Fixed activation energy means in Chemistry A-Level, as defined for OCR.
Definition of Fixed activation energy
Check what you remember
Read the wording for your board, then hide it and explain Fixed activation energy in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The activation energy itself does not change with temperature; what changes is the proportion of molecules exceeding it.
Topics that use Fixed activation energy
- Reaction rates (OCR A-Level)
Related terms
- Activation energy
- Alternative reaction pathway
- Boltzmann distribution
- Catalysis and activation energy
- Catalyst examples
- Catalyst regenerated and not consumed
- Catalyst regenerated in the mechanism
- collision frequency
Using Fixed activation energy in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Chemistry questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
A week of Premium from your first lesson · Then the free plan continues · No card, no charge