# Gases - Gases P V T n Em pi rica l Ga s La ws Ide al Ga s...

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Unformatted text preview: Gases P V T n Em pi rica l Ga s La ws Ide al Ga s La w Mi xt ur es Ma the ma tica l De sc ript ion s Ki ne tic En er gy Mo lec ul ar Sp ee d Re al Ga se s Ap pl ica tion s KM- Mo de l of Ga se s Be ha vi or & Pr op er ties • Highly compressible. • Occupy the full volume of their containers. • When gas is subjected to pressure, its volume decreases. • Gases always form homogeneous mixtures with other gases. • Gases only occupy about 0.1 % of the volume of their containers. General Characteristics of Gases General Characteristics of Gases Four Physical Quantities for Gases Phys. Qty. Symbol SI unit Other common units pressure P Pascal (Pa) atm, mm Hg, torr, psi volume V m 3 dm 3 , L, mL, cm 3 temp. T K °C, °F moles n mol Atmosphere Pressure and the Barometer Figure 10.2: Pressure Figure 10.2: Pressure A F P = • Standard atmospheric pressure = 760 mm of Hg • 1 atm = 760 mmHg = 760 torr = 101.325 kPa. Units: Force and Pressure • Closed Systems => manometers Figure 10.3: Pressure Figure 10.3: Pressure Figure 10.7: The Pressure-Volume Relationship: Boyle’s Law The Gas Laws The Gas Laws The Pressure-Volume Relationship: Boyle’s Law • Mathematically: • A sample of gas contained in a flask with a volume of 4 The Gas Laws The Gas Laws P V 1 constant × = constant = PV 2 2 1 1 V P V P ⋅ = ⋅ • A sample of gas contained in a flask with a volume of 1.53 L and kept at a pressure The Temperature-Volume Relationship: Charles’s Law • Charles’s Law: the volume of a fixed quantity of gas at constant pressure increases as the temperature increases....
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Gases - Gases P V T n Em pi rica l Ga s La ws Ide al Ga s...

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