For which of the following gases, the difference in specific heats at constant pressure and at const — Thermodynamics and Thermochemistry Chemistry Question

💡 Solution & Explanation

cp - cv = R/M (per gram). Given cp - cv = 0.04545 cal/g·K and R ≈ 2.0 cal/mol·K: M = R/0.04545 = 2.0/0.04545 = 44 g/mol. $N_2$(28), $N_2O$(44), $CO$(28), $CO_2$(44). Gases with M=44 are $N_2O$ and $CO_2$ (B and D correct).