According to what I know, intensive physical properties are those that are not equal to sum of partial quantities, and extensive properties are the opposite, i.e number of moles is extensive, but temperature is intensive (we can’t say that mixing a 30C body with a 40C body would make temperature of the mix 70C obviously).
Accordingly, why do we say that total pressure is the sum of partial pressures (Dalton’s law of pressure) since pressure is intensive, just like temperature? Is it the fact that pressure=force/area, and by keeping the same area and applying different forces having the same directions, the forces sum up which makes pressures sum up? But if this was correct, why do we consider pressure intensive from the beginning?
I’m lost here.