CHEM 120 Lecture 2: January 10 2019 Lecture 2 Chapter 4: Gases

• School: McGill University
• Department: Chemistry
• Course: CHEM 120
• Professor: Laura Pavelka, Samuel Sewall, Pallavi Sirjoosingh

Document Summary

January 10 2019 lecture 2 chapter 4: gases. Adopts and fills shape of its container. Gas molecules have a much larger space between them. Gases exert pressure on the walls of their containers. Atmospheric pressure = 101. 3 kpa = 1 atm = 760 mm hg = 760 torr = Our internal pressure matches the external atmospheric pressure. Placed open end of tube into a container filled with. P = mg/a = dvg/a = dhg since d=m/v and v = ah. Measures the pressure of a gas versus atmospheric pressure. Filled j shape glass tube with hg. At constant temperature (isothermal conditions), the volume decreases and the pressure increases. The volume of a fixed amount of an ideal gas at constant pressure is directly proportional to its temperature. All gases reach 0 volume at -273. 15 deg c = 0 k. At constant t and p, volume is proportional to number of mols. R = 0. 083145 lmol^-1k^-1 = 0. 08206 atmlmol^-1k^-1 = 8. 3145.