In an adiabatic process, the volume of an ideal gas doubles. The mean collision time changes from τ₁ to τ₂. If γ=Cₚ/Cᵥ for the gas, which option gives the source estimate for τ₂/τ₁?
Options

Question

In an adiabatic process, the volume of an ideal gas doubles. The mean collision time changes from τ₁ to τ₂. If γ=Cₚ/Cᵥ for the gas, which option gives the source estimate for τ₂/τ₁?

G1 Physics · Accepted Answer

The source answer key marks option A. The printed question uses the ratio τ₂/τ₁; with the standard kinetic-theory scaling of mean collision time, the literal ratio can lead to the reciprocal depending on the convention used. To remain faithful to the source key, option A is retained.