Question

If hydrogen gas is heated to a very high temperature, then the fraction of energy possessed by gas molecules correspond to rotational motion

• A. $\frac{3}{5}$
• B. $\frac{2}{7}$
• C. $\frac{3}{7}$
• D. $\frac{2}{5}$

Answer 1

Answer: (B)

Hydrogen is a diatomic molecules and if vibrational degrees of freedom are increased the degrees of freedom will be $3$ translation $2$ rotational and two vibrational.
$\therefore $ So total $7$ degree of freedom.
Fraction of energy possessed due to rotational motion: Degree of freedom due to rotation total degree of freedom $=\frac{2}{7}$