Now we have the combined gas law. The combined gas law was created from combining Boyle's law, Charles Law, and Gay Lusak's Law. We're going to say it highlights the relationship between the variables of pressure, volume and temperature. Remember, Boyle's law says that pressure is inversely proportional to volume. Charles losses that volume is directly proportional to temperature and gain loose X losses. That pressure is directly proportional to temperature.
If we take a look down here we can figure out how the combined gas law was derived. So it comes from combining Boyle's law, Trolls law and Gelu Sack's law. If we look we have pressure and volume as numerators. So volume here numerator, pressure here numerator. So they share those variables in common with one another. So that would be PV as numerators.
Charles Law and Galusak's law have as their denominators temperature, so that comes down here. O here we'd say that the combined gas law is PVT = k. So k here would be a constant. This here would represent our combined gas law and if we're dealing with two sets of pressures, volumes and temperature, then it can go further and say P1V1T1 = P2V2T2. So this is how the combined gas law can be derived from these earlier chemistry gas laws.