Lesson 3 Flashcards
Exothermic reaction
A chemical reaction that releases thermal energy
Endothermic reaction
Chemical reactions that absorb thermal energy
Activation energy
The minimum amount of energy needed to start a chemical reaction
Catalyst
Substance that increases reaction rate by lowering the activation energy of a reaction
enzyme
A catalyst that speeds up chemical reactions in living cells
Inhibitor
A substance that slows or even stops a chemical reaction
What happens when bonds between Adams break
They absorb energy from their surroundings
What happened when new bonds form
They release energy to the surroundings
What are two factors about particle collisions that affect rate
How often the particles collide and how fast they collide
What are four factors that affect rate of reaction
Surface area temperature concentration and pressure
If you increase or it increases the reaction rate besides what kind of factor
Everything if you speed it up it goes faster for service area which it go slower
How does a catalyst increase reaction rate?
By increasing the contact between particles
What happens in exothermic reaction
Thermal energy is released we can get hotter and the reactants are products plus thermal energy
What do both exothermic and reactions do?
Both use activation energy to start the reaction
What happens in a endothermic reaction
Thermal energy is absorbed making it colder and the products are reactants and thermal energy
