(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

4.60×1023 nitrogen molecules collide with a 20.0cm^2 wall each second. Assume that the molecules all travel with a speed of 450m/s and strike the wall head on.

What is the pressure on the wall in pascals (Pa)?

2. Relevant equations

p=(1/3)*(N/V)*(m*v_rms^2)

where,

N is the number of molecules: 4.60*10^23

V is the volume: 0.002m^2

m is the mass (diatomic): (14u*2*1.66*10^-27kg/u)

v is the rms speed 450m/s?

3. The attempt at a solution

p=(1/3)*(4.60*10^23/0.002)*(450^2)*(14*2*1.66*10^-27)=722*10^3Pa

Am I wrong on the v_rms? The v_rms is almost always within 10% of the v_avg.

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# Homework Help: Pressure on a wall due to n N2 molecules (close to ans)

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