Q. The most probable speed of 8 g of $H_{2}\ 200\ ms^{- 1}$. Average kinetic energy of $H_{2}$ gas is
A) 240 J
B) 180 J
C) 320 J
D) 360 J
Explanation
(a)
$200 = \sqrt{\frac{2RT}{2 \times 10^{- 3}}}$
or $RT = 40$
Average kinetic energy $= \frac{3}{2}nRT$
$= \frac{3}{2} \times \frac{8}{2} \times 40$
$= 240\ J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.