Question 1
The rotation spectrum of the HCl molecule suggests a photon in the far infrared (around 5.0 × 10−6 m) can excite the first rotational level. From this data, the moment of inertia of the HCl molecule (in kg ⋅ m2) is
◦
2.8 × 10−48
◦
2.8 × 10−49
◦
2.8 × 10−47
◦
2.8 × 10−46
◦
2.8 × 10−45
Question 2
The rotational kinetic energy of a diatomic molecule can take the form
◦
(1/2)mω2
◦
(1/2)Iω2
◦
[m1m2/(m1 + m2)]r2ω2
◦
(1/2)mv2
◦
1/2 μω2