\"A chemistry student related the following story: I noticed my car tires were a

Question

"A chemistry student related the following story: I noticed my car tires were a bit low and. went to the gas station. As I was filling the tires with air, I thought about the ideal gas law and I realized that I was increasing both the pressure and the volume of the tires as I filled the tires. Hmmm, I thought, that goes against what I learned in chemistry where I was told that pressure and volume are inversely proportional." Briefly explain what is wrong with the thinking of this chemistry student?

Explanation / Answer

For pressure and volue to be inversely propotional, the assumption is that n and T are constant. PV = nRT. The hole in the logic is that n is also increasing.

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