Untitled spreadsheet - Sheet1 Flashcards
Rate of reaction
The speed of a reaction.
Why will a chemical reaction occur?
When reactant particles collide with enough energy to react
Increasing the temperature of a reaction by 10°C will
Double the rate.
Activation energy
The minimum amount of energy needed for a reaction to happen. Ea
Adding a catalyst
Increases the rate by providing an alternative reaction path with a lower activation energy
Increasing pressure
More particles in a smaller volume. More frequent collisions.
Increasing concentration
More particles in the same volume of liquid. More frequent collisions.
Increasing temperature
Gives particles more energy. Move faster, collide more frequently. More effective collisions (collisions with energy greater than Ea)
Increasing surface area
Exposes more particles. More frequent collisions.
How can you measure the rate of a reaction?
By experiment. Measure product produced or reactant used up over time.
What does a normal rate curve graph look like?
Steep curve in the beginning, becoming less steep, eventually flattening out when the reaction stops.
What four factors can you alter to change the rate of a reaction?
Surface area, temperature, concentration (and pressure), add a catalyst
