Question

A vessel contains a non-linear triatomic gas. If $50$% of gas dissociate into individual atom, then find new value of degree of freedom by ignoring the vibrational mode and any further dissociation

• A. $2.15$
• B. $3.75$
• C. $5.25$
• D. $6.35$

Answer 1

The correct option is B $3.75$

Let's assume we have $1$ mole of triatomic gas

$\therefore 3Na$ is present

So, $0.5$ moles= $1.5Na$ atoms

$1$ part of $0.5$ moles remains untouched

Degree of dissociation= $0.5\times 6=3$

Degree of freedom for $0.5Na=1.5\times 0.5=0.75$

Total=$3+0.75=3.75$