C8 Flashcards
What is the equation for mean rate of reaction?
Quantity of reactant used ➗time OR Quantity of product formed ➗time
Why does an increased surface area lead to an increased reaction rate?
More particles are exposed and are able to react at a given time
Why does an increased temperature lead to an increased reaction rate?
When a substance is heated, energy is transferred to its particles and the particles move faster. They collide and react more frequently.
Why does an increased concentration or pressure lead to an increased reaction rate?
There are more particles of reactants moving around in the same volume of solution
What is equilibrium?
The rate of the forward reaction equals the rate of the reverse reaction
What is a catalyst?
A substance that changes the rate of a reaction whiteout getting chemically changes itself
How do catalysts work?
They provide an alternative pathway to the products, with a lower activation energy than the reaction without a catalyst
