QuestionThermodynamics / heat capacity ratio
The ratio of specific heat of gases at constant pressure (Cp) and constant volume (Cv) of N₂ molecule is:
- (a) 1.667
- (b) 1.400
- (c) 1.330
- (d) 1.520
Answer: (b) 1.400
N₂ is diatomic: at room temperature Cv = 5/2 R, Cp = 7/2 R. γ = 7/5 = 1.40 → (b). Monoatomic 1.67; non-linear polyatomic ~1.33.