Ideal Gases
One mole is the quantity of substance whose mass (g) is equal to the substance's molar mass (g/mol). EX: Carbon 12. Molar mass is 12g/mol and 1 mol has a mass of 12 g. Avogadro's Constant. Na = 6.02 x 10^{23} this is the number of molecules or atoms or nuclei that are in ONE mol. This is true for any substance. 1 Liter = 1 dm^{3} = 0.001 m^{3}. Pressure = Force/Area. Microscopic understanding of Pressure on page 9 of Thermal Organized Notes.
PV = constant V/T = constant P/T = constant PV/T = PV/T Ideal Gas Law: PV = RnT. R = 8.31 J/(mol K). A gas that obeys this law at all temperatures, pressures, and volumes is said to be an ideal gas. Q7  Q14. We also know that:
Alternative Form: PV = kNT. N = number of molecules or atoms. k = Boltzman constant = 1.38 x 10^{23 } Energy of an Ideal Gas.
Ideal gases follow the Ideal Gas Law (they cannot be liquified). Real gases can approximate to ideal behavior providing that the intermolecular forces are small enough to be ignored. For this to apply, the pressure/density of the gas must be low and the temperature must be reasonably high . HW. Page 181: 19, 15, 16, 17. MIT Lecture (6:55  30:25)


