Sherpa

Existing user?

Combined Science: Chemistry

GCSE · Edexcel · foundation

QuestionsFlashcards

Obtaining & Using Metals
Reversible Reactions & Equilibria
- Reversible Reactions & Equilibrium
  3
- The Haber Process
  4

Group 1
- Group 1 (Alkali Metals)
  4
- Group 1: Reactivity & Electronic Configurations
  4
Group 7
Group 0

Collision Theory Flashcards

All 5 cards in this deck

Why does increasing the temperature increase the rate of a reaction?: Particles have more energy and move faster, so they collide more frequently, and a higher proportion of collisions have at least the activation energy.
Why does increasing the concentration of a solution increase the rate of a reaction?: There are more particles in the same volume, so there are more frequent collisions.
Why does increasing the pressure of reacting gases increase the rate of a reaction?: The particles are closer together (more particles in the same volume), so collisions are more frequent.
Why does using a solid as a powder instead of large lumps increase the rate of reaction?: The powder has a larger surface area to volume ratio, so there are more frequent collisions and a faster rate.
True or false? Every collision between reactant particles causes a reaction.: False. Only collisions with at least the activation energy are successful and lead to a reaction.