Chemical energetics Flashcards
1
Q
What is an exothermic reaction
A
A reaction that transfers thermal energy to the surroundings
2
Q
What is an endothermic reaction
A
A reaction that absorbs thermal energy from the surroundings
3
Q
What is the enthalphy change for an exothermic reaction
A
Negative
4
Q
What is the enthalpy change of an endothermic reaction
A
Positive
5
Q
Define activation energy
A
The minimum energy needed for colliding particles to react
6
Q
What process is bond breaking
A
Endothermic
7
Q
What process is bond making
A
Exothermic
8
Q
How to calculate the enthalpy change using bond energies
A
Energy needed - energy released
