Question

Molar specific heat at constant volume, for a non-linear triatomic gas is (vibration mode neglected)

• A. 3R
• B. 4R
• C. 2R
• D. R

Answer 1

Answer: (A)

Molar heat capacities for a gas is given by
$C_v=\frac{f}{2}RT$
Where $f=6$ in triatomic molecules
$C_v=3RT$