Question

One mole of a monoatomic gas is mixed with $3$ moles of a diatomic gas. What is the molecular specific heat of the mixture at constant pressure?

Answer 1

Given a mixture with One mole of a monoatomic ideal gas is mixed with two moles of a diatomic gas.

The specific heat of the mixture =$C=\frac{1\times C_1+2\times C_2}{3}=\frac{1\times \frac{3R}{2}+2\times \frac{5R}{2}}{3}=2.17R$