5.2.2 Bond breaking and making Flashcards
1
Q
What does bond breaking mean in terms of enthalpy change?
A
Heat energy is absorbed, it is an endothermic reaction which is a + enthalpy change.
2
Q
What does bond making mean in terms of enthalpy change?
A
Heat energy is released, it is an exothermic reaction which is a - enthalpy change.
3
Q
For each bond what is the amount of heat energy called?
A
Bond energy
4
Q
How to calculate enthalpy change from bonds broken and made?
A
Enthalpy change = bonds broken - bonds made
5
Q
What is a reaction profile diagram?
A
An energy level diagram but it also shows the path the reaction takes from reactants to products.
6
Q
What is the energy needed to break bonds called?
A
Activation energy
