CHY 103 Chapter Notes - Chapter 5: Ideal Gas Law, Avogadro Constant, Kinetic Theory Of Gases
7 Dec 2017
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De nition:the result of constant collision between the atoms or molecules in a gas and the surface around them is pressure. Note: 1. gaseous atoms and molecules have constant motion in air. 2. the particles collide with each other and surface around them which exerts some small forces. Some pressure rules: 1. the fewer the gas particles the lower the pressure. (density) 2. increase in altitude makes the pressure to decreases. (fewer molecules per unit volume in air) De nition of stp:the pressure that atmosphere exerts on earth"s surface is standard atmospheric pressure which is originally de ned by mercury barometer. Note: the atmospheric pressure on the level of the sea is 760 mmhg(torr). Common units: 1 bar=100000 pa=100 kpa=750. 01 torr=0. 986 atm=14. 504 psi. Boyle"s law: as the volume decreases the pressure increases. Because pressure is the result of the collision of gas particles with the container.
