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Consider a gas at very low temperature(lower than critical) and pressure . Upon increasing pressure it will transform to liquid state.

I know that speed of sound is independent of pressure, and also speed of sound is more in solids than in liquids than in gases.

So if I increase pressure of the gas will the velocity of sound increase or remains same in other state?

1 Answers1

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I know that speed of sound is independent of pressure

No, it isn't. It's just not directly dependent on it so it's said that the speed of sound in gases depends on the temperature, molecular composition, and heat capacity ratio of the gas. But temperature and heat capacity ratio depend on pressure. Furthermore, the dependencies on temperature don't always cancel each other out.

If the state changes to a liquid, the speed of sound depends on the medium's compressibility and its density. The latter of which you change by changing its pressure.

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