⚛️ Physics · Kinetic Theory · NEET & JEE

For a monatomic ideal gas, the ratio of specific heats γ = Cp/Cv is:

Answer: 5/3.

A 7/5
B 5/3
C 4/3
D 9/7

Correct answer: B. 5/3

Explanation: For monatomic gases, Cv=(3/2)R and Cp=(5/2)R, giving γ = 5/3 ≈ 1.67.

Not all gas molecules move at the same speed - the Maxwell-Boltzmann distribution shows the spread, with the most probable speed v_p slightly less than the average v_avg, which is slightly less than the root-mean-square speed v_rms used in the pressure formula.

Concept context

Kinetic theory of gases connects molecular motion to pressure and temperature, explaining gas laws, specific heats, and molecular speeds.

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For a monatomic ideal gas, the ratio of specific heats γ = Cp/Cv is:

Concept context

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