# Chapter 18 - Exercises and Problems - Page 331: 30

1.4

#### Work Step by Step

We know that the specific heat ratio of the mixture is equal to the sum of the number of moles of each gas (each multiplied by their respective heat ratio) over the number of moles of gas. Thus: $\gamma = \frac{(50)(1.29)+(30)(1.4)+(20)(1.67)}{50+30+20}=1.4$

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.