4.2 Collision Theory And Surface Area Flashcards Preview

GCSE Chemistry 2.4 Rates And Energy > 4.2 Collision Theory And Surface Area > Flashcards

Flashcards in 4.2 Collision Theory And Surface Area Deck (4)
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1

What is the minimum energy called for a reaction to start?

Activation energy

2

Name 5 factors that affect the chance of collisions and ultimately the rate of reaction

•temperature (particles have more kinetic energy to move and collide)
•concentration of solutions (higher concentration has more reactant particles so collide more)
•pressure of gases
•surface are of solids (higher SA of solids means that they will collide more frequently)
•using a catalyst

3

Why are reactions faster with powders than large pieces?

They have a larger surface area so more collisions happen in the same time

4

What does the collision theory state?

Reactions can only happen if particles collide with enough energy to change into new substances