Q. The mean kinetic energy of a gas at $300\ K$ is $100\ J.$ The mean energy of the gas at $450\ K$ is equal to
A) $100\ J$
B) $3000\ J$
C) $450\ J$
D) $150\ J$
Explanation
(d) Average kinetic energy $\propto$ Temperature
$\Rightarrow \frac{E_{1}}{E_{2}} = \frac{T_{1}}{T_{2}} \Rightarrow \frac{100}{E_{2}} = \frac{300}{450} \Rightarrow E_{2} = 150J$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.