Question

What is the total translational and rotational energy of 1 mole of oxygen at 300$K$:

[$R=8.314Jmo{l}^1{K}^1$ ]

• A. 6235.5 $J$
• B. 623.25 $J$
• C. 62.325 $J$
• D. 6.2325 $J$

Answer 1

The correct option is A 6235.5 $J$

As we know,

$E_T=\frac{3}{2}RT$

$E_R=RT$

$E_{total}=\frac{3}{2}RT+RT=\frac{5}{2}RT=\frac{5}{2}\times 300\times 8.314$

= 6235.5 $J$

Hence, the correct option is $\text{A}$