
Interpretation:
The values of rotational constants
Concept introduction:
In a molecule, the rotational energy level corresponds to the different probable ways in which the portion of a molecule rotates around the chemical bond that binds it to the rest of the molecule. Every rotational energy level possesses degeneracy.
The asymmetric top refers to a rotor that has the different value for all moments of inertia. For asymmetric top molecule,

Answer to Problem 14.18E
The values of rotational constant
The values of rotational constant
The values of rotational constant
Explanation of Solution
Water is an asymmetric top molecule. For asymmetric top molecule,
The value of
Where,
•
•
•
The relation between reduced Planck’s constant and Planck’s constant is shown below.
Substitute the values of
Therefore, the rotational constant
The conversion of J into
Therefore, the conversion of
Therefore, the rotational constant
The rotational constant
Substitute the values of
Therefore, the rotational constant
The conversion of J into
Therefore, the conversion of
Therefore, the rotational constant
The rotational constant
Substitute the values of
Therefore, the rotational constant
The conversion of J into
Therefore, the conversion of
Therefore, the rotational constant
The values of rotational constant
The values of rotational constant
The values of rotational constant
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Chapter 14 Solutions
Physical Chemistry
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