Does air molecules travel with the same speed as the sound wave?

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SUMMARY

Sound travels through air at a speed of 340 m/s, but the average speed of air molecules is significantly higher, approximately 500 m/s at 20°C. The propagation of sound is facilitated by the movement of air molecules colliding with each other, which does not equate to the speed of sound itself. Therefore, while sound travels at 340 m/s, the individual air molecules move faster than this speed, demonstrating the difference between sound wave propagation and molecular motion.

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Hi all,

As sound travels through air, does the air molecules travel with the same speed as well?

In other words, if sound is traveling in air at 340m/s, does it also then mean that the mean speed of all the affected air molecules is 340m/s?

I personally do not think so. I guess that the speed of air molecules will be greater than 340 m/s, but i do not know how to explain. Nor am i totally sure. :redface:

Fellow forummers can help me please?
 
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Yes, the average speed of the air molecules would have to be equal to the speed of sound, as sound is propagated by air molecules moving in the direction of the sound, hitting each other.
 
Average speed of air molecules around 20 C is 500 m/s. The speed of sound is related to the rate of propagation of an impulse wave via collisions.
 

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