hannahbrown802
05.05.2020 •
Chemistry
The mass of the deuterium molecule D2 is twice that of the hydrogen molecule H2. If the vibrational frequency of H2 is 1.29 × 1014 Hz, what is the vibrational frequency of D2, assuming that the "spring constant" of attracting forces is the same for the two species? Answer in units of Hz.
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Ответ:
9.12x10¹³ Hz
Explanation:
The vibrational frequency (ω) of a molecule is given by:
Where:
k: is the spring constant
μ: is the reduced mass
The reduced mass of a diatomic molecule is:
Where ma and mb are the atomic masses of the atoms a and b, respectively, of the diatomic molecule.
Hence, the vibrational frequency of the hydrogen molecule is:
(1)
From equation (1) we can find k:
(2)
The vibrational frequency of the deuterium molecule is:
(3)
By entering equation (2) into equation (3) we can calculate the vibrational frequency of the deuterium molecule:
Therefore, the vibrational frequency of the deuterium molecule is 9.12x10¹³ Hz.
I hope it helps you!
Ответ:
well they'd have higher potential energy
so gravitational