Ch. 5 - Silberberg, Chapter 5 Gases 5.1 An Overview of the...

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Silberberg, Chapter 5 Gases (Review) 5.1 An Overview of the Physical States of Matter 1. Gas volume changes greatly with pressure. 2. Gas volume changes greatly with temperature. 3. Gases have relatively low viscosity. 4. Most gases have relatively low densities. 5. Gases are miscible. Molecules are much father apart in the gas phase than in either the liquid or solid states. 5.2 Gas Pressure and its Measurement Pressure: the force exerted per unit of surface area. Barometer: a device used to measure atmospheric pressure. Manometer: a device used to measure the pressure of a gas in an experiment. SI units of pressure: Pascal (Pa) Force = 1 N = 1 kg m/s 2 (Newton = N are SI units for force) Pressure = 1 Pa = 1 N/m 2 Standard atmosphere = 1 atm = 101.325 kPa = 1.01325 x 10 5 Pa Millimeters of Mercury = 1 mmHg = 1 torr = 1 760 atm In chemistry, 1 bar = 1 x 10 5 Pa 5.3 The Gas Laws 1. Boyle s Law: at constant temperature (T), the volume (V) occupied by a fixed amount of gas ( n ) is inversely proportional to the applied pressure (P).
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This note was uploaded on 06/15/2010 for the course CHEM 124 taught by Professor Hascall during the Winter '08 term at Cal Poly.

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Ch. 5 - Silberberg, Chapter 5 Gases 5.1 An Overview of the...

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