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  • Consider a gas of triatomic molecules. The molecules are assumed to be triangular and made of massless rigid rods phase vertices are occupied by atoms. The internal energy of a mole of the gas at temperature T is  <img src="data:image/png;base64,i

Consider a gas of triatomic molecules. The molecules are assumed to be triangular and made of massless rigid rods phase vertices are occupied by atoms. The internal energy of a mole of the gas at temperature T is 
Option: 1 \frac{5}{2}RT
 
Option: 2 \frac{3}{2}RT
Option: 3 \frac{9}{2}RT  
Option: 4 3\; RT

Answers (1)

best_answer

Degree of freedom of the non-linear triatomic molecules is - 6

As we know that the internal energy of the triatomic gas is - 

\frac{f}{2}. R.T

Now f = 6

So, Internal energy -

\frac{6}{2}. R.T = 3RT

Posted by

avinash.dongre

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