Originally Posted by Akash1886
For this we can't assume until we practically drive 2 cars (one with Nitrogen and other with normal) back to back. Then we can check and come to a conclusion as to what exactly would be the rise in Psi.
That's the most practical solution. I think the heat energy produced would be used for following in a tyre filled with normal air.
1. Evaporate the water vapor content in normal air.
2. The Oxygen molecules present in normal air would get heated up and their kinetic energy would be increased, and as they are small in size there is a chance for them to escape through side walls when the tyre is subjected to deformations (due to potholes and imperfections on the roads).
3. So as the heat energy created is being used for the above mentioned steps, the temperature would get reduced and hence the pressure. (If volume is fixed, pressure is directly proportional to temperature).
4. As the oxygen molecules are getting escaped in this fashion, after sometime the remaining air in the tyre would be almost full of nitrogen+other gases (with less or no oxygen).
Note : I am not an expert. The above statements found to be logical to me. I am happy to be proved wrong.