Vibrational Energy of Diatomics Flashcards
1
Q
When dealing with 2 atoms what mass do we use
A
Reduced mass, μ
2
Q
Frequency and bond strength equation
A
v^=(1/2pi)*(k/μ)^1/2
3
Q
Energy for harmonic oscillator
A
E = (v+1/2)hv^
4
Q
Change in energy for harmonic oscillator
A
DeltaE= hv^=ℏw
5
Q
What does harmonic oscillator tell us?
A
The spacing between energy levels dependent on mass and stiffness, but only works for small displacement
6
Q
Why does harmonic oscillator only work for small displacement.
A
Larger displacement the bond will ‘break’ so k will decrease so v^ will decrease causing energy gap to decrease
7
Q
Selection rule
A
Delta v = 1
8
Q
How to calculate bond strength?
A
It will be k (spring constant), use equation relating them to molecular frequency and solve using wavenumber etc.
