C5: Energy Changes (triple) Flashcards
1
Q
Describe the reaction profile of an Exothermic reaction.
A
The energy of the reactants increases until they have enough energy to react.
The energy is released so the product has less energy than the products.
2
Q
Describe the reaction profile of an endothermic reaction.
A
A lot of energy is required to start the reaction.
What they react the products absorb the energy so they have more energy than the reactants.
3
Q
What is bond breaking?
A
Endothermic
4
Q
What is bond making?
A
Exothermic
5
Q
Overall energy change =
A
Energy required to break bonds - energy released by bonds forming
6
Q
Is a bond energy calculation for an Exothermic reaction positive or negative?
A
Negative
7
Q
Is a bond energy calculation for an Endothermic reaction positive or negative?
A
Positive
