Chemistry 1302A/B Chapter Notes - Chapter 1.2: Ideal Gas Law, Molar Mass, Vapor Pressure
2 Feb 2018
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This also means that equal volumes of different gases at the same temperature and pressure contain the same number of moles. Variations of the ideal gas law: the ideal gas law can be used to determine the molar mass of a gas of a fixed volume, temperature, and pressure. The density (d) of any substance is defined as the mass occupied per unit volume: This means: which can be arranged to give: If the pressures of each gas are expressed in terms of the mole fractions, then pa = xapt, Note that the sum of all the mole fractions is always 1. In other words, xa + xb + xc = 1: the ideal gas law can be applied to each individual constituent of a gas mixture, as well as the gas mixture as a whole. For each constituent, the ideal gas law can be written as:
