6.2 Enthalpy Flashcards
1
Q
What is enthalpy?
A
The measure of the heat energy that is released or absorbed when bonds are broken and formed during a reaction that is run at constant pressure
2
Q
What are the two general principles regarding enthalpy?
A
- When a bond is formed, energy is released and change in enthalpy is negative
- When a bond is broken, energy is required and change in enthalpy is positive
3
Q
What is enthalpy change also known as?
A
Heat of a reaction
4
Q
What does exothermic mean?
A
Energy is released from the system
5
Q
What does endothermic mean?
A
Input of energy into the system
6
Q
What is the enthalpy for an exothermic reaction?
A
Negative
7
Q
What is the enthalpy for an endothermic reaction?
A
Positive
