I talked to a teacher of mine these days, and he argued that the reason H2 is bellow Ideal gas in the Pb/Pm X Pm graph (assuming it does as shown in the Halliday 5th edition book) has something to do with it's low mass and so low ability to transfer momentum between its particles.
He said that...
Ok. For further analyzing the subject, I don't know if it would be acceptable to apply the van der Waals equation for real gases in the preceding situation. It's just an approximation, but let's suppose this equation works for the situation above.
Let's do the calculations:
Van der Waals...
Ok, let's say we have at our disposal a thermometer of constant volume gas.
Inside it, we'll put a real gas, like Helium or Molecular Hydrogen. Ok, the gas compartment is placed inside a mixture of liquid water and ice, so we guarantee the gas inside is at 273.15 K. We measure its pressure...