If for a gas R/Cᵥ = 0.67, this gas is made up of molecules which are:

Question

G1 Physics · Accepted Answer

Step 1: For an ideal gas with f active degrees of freedom, Cᵥ = (f/2)R. Step 2: Therefore R/Cᵥ = 2/f. Step 3: Given R/Cᵥ ≈ 0.67 ≈ 2/3, so f ≈ 3. Step 4: A monoatomic ideal gas has three translational degrees of freedom. Final answer: (C) monoatomic.