Consider a gas of triatomic molecules. The molecules are assumed … - Vidyadip

MCQ

Consider a gas of triatomic molecules. The molecules are assumed to the triangular and made of massless rigid rods whose vertices are occupied by atoms. The internal energy of a mole of the gas at temperature $T$ is $......RT$

A
$4.5$
B
$1.5$
C
$2.5$
✓
$3$

✓

Answer

Correct option: D.

$3$

d
$DOF =3+3=6$

$U =\frac{ f }{2} nRT =3 RT$

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