Oxygen molecule average speed

PROBLEM 9.19 At what temperature does the average speed of an oxygen molecule equal that of an airplane moving at 580 mph ... 

Traffic on the German autobahns reaches speeds of up to 230 km/h. At what temperature (°C) do oxygen molecules have this same average speed ... 

How does the average speed of a nitrogen molecule in air compare to that of an oxygen molecule in air (Air is approximately 20% oxygen and 80% nitrogen by moles.)... 

Oxygen molecules in the atmosphere, at room temperature, travel at an average speed of 443 m/s. This is approximately 1600 km/h ... 

Oxygen molecules have an average speed of about 480 m/s at room temperature. At the same temperature, what is the average speed of molecules of sulfur hexafluoride, SFe ... 

FIGURE 9.19 A small hole in the box permits molecules to effuse out into a vacuum. The less massive particles (here, helium atoms, red) effuse at greater rates than the more massive oxygen molecules (purple) because their speeds are greater on the average. 

Compute the root-mean-square speed, the average speed, and the most probable speed of an oxygen molecule at 300 K and at 500 K. Compare with the values for hydrogen. 

In a binary collision between hard-sphere molecules, what ratio of molecular masses results in the maximim transfer of translational energy What is AE /EjO for collision between hydrogen (A) and oxygen (B), each with a line-of-center velocity equal to one-half the average speed at 25°C (given in Table 2.2b) ... 

What fraction of oxygen molecules at 275.15 K have a speed within 1% of the average speed ... 

Estimate the speed at which the average oxygen molecule is moving in the room that you are in. 

Solution The coefficient of diffusion D is expressed through physical characteristics of molecules by the formula (3.7.16) D = (l/3Ku)A, where average molecules speed (3.3.7 ) and X the mean free path. Therefore, we can write the diffusion coefficients for oxygen and hydrogen (to an order of 1/3) ... 

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