Chem 6.4 Overlapping Orbitals Flashcards
What type of bind is an s and a p
Sigma
What type of bond are 2 s orbitals
Sigma
What type of bond are 2 p orbitals head to head? Side to side?
Sigma
Pi
In a sigma bond, where is the overlap region located
Between the two bonding nuclei on bonding axis
In a pi bond where is the overlap region located
Above and below the bonding axis
A single covalent bond is always a _________ bond
Sigma
A multiple covalent bond always has __ sigma bond and the rest are ___ bonds
1
The rest
A sigma bond is ______ than a pi bond
Stronger
Bond energy
The amount of energy required to break one mold of bonds units kg/mol
The higher the bond energy the ______________ and more ________ the bond is
Stronger, stable
A molecule represented by resonance structures is
An average of these two structures
pm
Pi competed, 1 billionth of a meter
The two electrons in the pi bond are _________________ meaning what
Delocalized
The electrons are able to move around all 3 atoms
Any bonds in resonance structures have identical ______ and ______
Lengths and bond energies
When a bond breaks, energy is ___________ when a bond forms energy is ___________
Absorbed, released
Breaking bonds is
Endothermic
Forming bonds is
Exothermic
Heat of reaction (delta H)
The difference between the heat absorbed and heat released
How is the heat of reaction calculated
=(bonds breaking)-(bonds forming)
