C7 - Energy changes] Flashcards
1
Q
C7 - What is an exothermic reaction?
A
A reaction that releases heat to the surroundings.
The reactants have more energy than the products.
2
Q
C7 - What is an endothermic reaction?
A
A reaction that absorbs heat from the surroundings.
The reactants have less energy than the products.
3
Q
C7 - What kind of process is bond-breaking?
A
Endothermic.
Energy is required to make bonds
4
Q
C7 - What kind of process is bond-making?
A
Exothermic.
Energy is released when new bonds are made.
5
Q
C7 - What is the definition for activation energy?
A
(Ea) The minimum energy required for a reaction to occur.
Activation energy is needed to break the bonds that already exist between reactant molecules.
