Bond Enthalpies (9.3) Flashcards
1
Q
What is average bond enthalpy?
A
The energy required to break one mole of a specific type of bond in a gaseous molecule.
2
Q
What are the rules about bond enthalpies?
A
-Energy is always required to break bonds
-Bond enthalpies are always endothermic
-Bond enthalpy values are always positive
3
Q
What type of reaction always occurs when bonds are formed?
A
Exothermic reactions
4
Q
How can you calculate enthalpy changes from average bond enthalpies?
A
After calculating the bond enthalpies:
-Enthalpy change = reactants - products
