COMEDK · Physics · 14. Kinetic Theory of Gases
The mean energy per molecule for a diatomic gas is
- A \(\frac{5 k_B T}{N}\)
- B \(\frac{5 k_B T}{2 N}\)
- C \(\frac{5 k_B T}{2}\)
- D \(\frac{3 k_B T}{2}\)
Answer & Solution
Correct Answer
(C) \(\frac{5 k_B T}{2}\)
Step-by-step Solution
Detailed explanation
For an ideal gas, mean kinetic energy per molecule \(=\frac{f}{2} k_B T\) For diatomic gas, degree of freedom, \(f=5\) \(\therefore\) K.E per molecule \(=\frac{5 k_B T}{2}\)
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A thin plano-convex lens acts like a concave mirror of focal length \(0.2 \mathrm{~m}\) when silvered from its plane surface. The refractive index of the material of the lens is \(1.5\). The radius of curvature of the convex surface of the lens will beCOMEDK 2019 Hard
- A galaxy moves with respect to the earth, so that sodium line of \(589.0 \mathrm{~nm}\) is observed at \(589.6 \mathrm{~nm}\). The speed of the galaxy isCOMEDK 2014 Medium
- An ideal gas is taken through the cycle \(A \to B \to C \to A\), as shown in the figure (assume Volume \(V\) is in \(m^3\)). If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process \(C \to A\) is,
COMEDK 2022 Medium - The loudness and pitch of a sound note depend onCOMEDK 2013 Easy
- A mass of \(0.1 \mathrm{~kg}\) is hung at the \(20 \mathrm{~cm}\) mark from a \(1 \mathrm{~m}\) rod weighing \(0.25 \mathrm{~kg}\) pivoted at its centre. The rod will not topple ifCOMEDK 2012 Hard
- The instantaneous values of alternating current and voltages in a circuit are \(I=\dfrac{3}{\sqrt{2}} \sin (200 \pi t)\) ampere and \(\mathrm{V}=\dfrac{3}{\sqrt{2}} \sin \left(200 \pi t+\dfrac{\pi}{6}\right)\) volt. What is the average power consumed in the circuit in watt?COMEDK 2025 Medium
More PYQs from COMEDK
- \(5.8 \mathrm{~g}\) of a gas maintained at \(95^{\circ} \mathrm{C}\) occupies the same volume as \(0.368 \mathrm{~g}\) of hydrogen gas maintained at a temperature of \(17^{\circ} \mathrm{C}\) and pressure being the same atmospheric pressure for both the gases. What is the molecular mass of the unknown gas?COMEDK 2023 Medium
- A particle on the trough of a wave at any instant will come to the mean position after a time \((T=\) time period \()\)COMEDK 2017 Easy
- Electrons are excited from \(n=1\) to \(n=4\) state. During downward transitions, possible number of spectral lines observed in Balmer series isCOMEDK 2016 Easy
- The point \((5,-7)\) lies outside the circleCOMEDK 2019 Medium
- A partiele exeeutes a linear SHM with an amplitude of \(4 \mathrm{~cm}\). At the mean position the velocity of the particle is \(10 \mathrm{~cm} / \mathrm{s}\). What is the displacement of the particle when its speed becomes \(5 \mathrm{~cm} / \mathrm{s}\) ?COMEDK 2020 Hard
- Hybridised state of bromine in bromine pentafluoride isCOMEDK 2015 Medium