# Homework Help: Heat Capacity Ratio

1. Feb 17, 2010

### moomoo345

1. The problem statement, all variables and given/known data
This is more of a conceptual question. I understand that the heat capacity ratio is basically the ratio between the heat capacity at constant pressure to the heat capacity at constant volume.
I was asked to calculate the ratio of heat capacities for Nitrogen at two speeds of sounds that I derived. One speed was 350.4 m/s and the other was 295.6 m/s. I was able to calculate the ratios with the equation given below. I got 1.387 and 0.987 respectively from the speeds above.

My question is which velocity is best to use and why? I'm having a hard time answering this question simply because I don't think I fully understand the concept of the heat capacity ratio, as in is it more advantageous to have a ratio closer to 1? or have a ratio greater than 1?

2. Relevant equations

gamma = (Mv^2)/RT

M=molar mass

3. The attempt at a solution

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