Bond Energies Flashcards
1
Q
What is the total chemical potential energy?
A
The energy stored within the chemical bonds
2
Q
Energy - Breaking bonds
A
Requires energy
3
Q
Energy - Forming Bonds
A
Releases energy
4
Q
What can the difference in bond energies of reactants and products be used to determine?
A
Change in enthalpy for a reaction
5
Q
Bond Dissociation Energy
A
Energy required to break a chemical bond
6
Q
How are bond dissociation energies determined?
A
- Experimentally
- Depends on the types of atoms and bonds in a molecule
7
Q
What are average bond energies used for?
A
To predict enthalpy changes in chemical reactions
8
Q
Multiple bonds are…
A
- Shorter and stronger
- More energy is required to break them
9
Q
Single bonds are…
A
- Longer and weaker
10
Q
“Σ” represents
A
sum of
11
Q
“n” represents
A
The amount of moles of a particular bond type
12
Q
“D” represents
A
- The bond energy per mole of a bond
- It is always positive
13
Q
Step 1 of calculating ΔH using bond energies
A
- Balance chemical equation
14
Q
Step 2 of calculating ΔH using bond energies
A
- Draw Lewis structures
15
Q
Step 3 of calculating ΔH using bond energies
A
- Determine the number of bonds in each molecule
