# Speed of sound in mixture of gases

Tags:
1. Feb 13, 2015

I am trying to calculate the speed of sound in a mixture of 2 gases like oxygen an ozone.
First step: I calculated $\gamma_{eff}$ of the mixture by first calculate the $C_V$ of mixture by using a formula $$C_V=\frac{n_1C_1 + n_2C_2}{n_1+n_2}$$

Step 2: in the formula $$v=\sqrt{\frac{\gamma RT}{M}}$$, where M is molecular mass, which M should I use?or what will be the value of M here?

2. Feb 13, 2015

### Staff: Mentor

The molar average, like Cv.

Chet