This comparison covers Five Rate Factors — Side by Side within Factors Affecting Rate for GCSE Chemistry. Revise Factors Affecting Rate in Rates of Reaction for GCSE Chemistry with 24 exam-style questions and 18 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 6 of 13 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
⚖️ Five Rate Factors — Side by Side
| Factor | Change | What Increases? | Effect on Ea? |
|---|---|---|---|
| Temperature | ↑ | Collision frequency AND proportion with E ≥ Ea | Unchanged |
| Concentration | ↑ | Collision frequency only | Unchanged |
| Pressure (gases) | ↑ | Collision frequency only | Unchanged |
| Surface area | ↑ | Collision frequency (exposed particles) | Unchanged |
| Catalyst | Added | Proportion of collisions with E ≥ Ea | Lowered |
Practice questions for Factors Affecting Rate
Which of the following factors does NOT affect the rate of a chemical reaction?
Explain, in terms of particles, why increasing temperature increases the rate of reaction.
Quick recall flashcards
What are enzymes?
Biological catalysts - specific and work at certain temperatures
What are the four factors that affect rate of reaction?
Temperature, Concentration, Surface area, Catalyst