Exothermic And Endothermic Reactions. Flashcards
1
Q
What is an exothermic reaction?
A
When the reaction releases energy to the surroundings, this reaction has a negative enthalpy change.
2
Q
What is an endothermic reaction?
A
A reaction with a positive enthalpy change. Takes energy in from the surroundings.
3
Q
Compare the reactants and products in an exothermic reaction.
A
The reactants have a higher enthalpy than the products.
4
Q
Compare the reactants and products in an endothermic reaction.
A
The products have higher enthalpy than the reactants.
5
Q
What is the name of the energy required in order for a reaction to start?
A
Activation energy
6
Q
Why must there be activation energy?
A
To break bonds.
7
Q
In an exothermic reaction, where does the activation energy often come from?
A
A heat source like a flame, match or Bunsen burner.
