Ratio of specific heats γ for monatomic gas:
A7/5
B9/7
C1
D5/3 ≈ 1.67
Answer & Solution
Correct answer: D. 5/3 ≈ 1.67
**For ideal gas with f degrees of freedom:** γ = 1 + 2/f.
Monatomic (f=3): γ = 5/3. Diatomic (f=5): γ = 7/5 = 1.4. Triatomic (f=6 or 7): γ ≈ 4/3 or 9/7.
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