Gas Laws

Gas Laws February 10 th & 11 th , 2010 Ms. Komperda

The Kinetic Molecular Theory is a set of statements that describe the behavior of gases ,[object Object],[object Object],[object Object],[object Object],[object Object]

Ideal vs Real Gases ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Properties of Gases ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pressure ,[object Object],[object Object],[object Object],[object Object]

Pressure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Pressure Conversions = 0.9182 atm = 0.625 atm 475 mm Hg x 93.01 kPa x

Boyle’s Law ,[object Object],[object Object],Robert Boyle (1627-1691). Son of Earl of Cork, Ireland.

Boyle’s Law ,[object Object],[object Object]

Charles’s Law ,[object Object],[object Object],[object Object],[object Object],[object Object],Jacques Charles (1746-1823). Isolated boron and studied gases. Balloonist. =

Charles’s Law ,[object Object],[object Object],[object Object]

Gay-Lussac’s Law ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Joseph Louis Gay-Lussac (1778-1850)

[object Object],[object Object],[object Object],[object Object],Combined Gas Law No, it’s not related to R2D2

[object Object],[object Object],[object Object],Combined Gas Law P 1 V 1 T 1 P 2 V 2 T 2 Boyle’s Law Charles’ Law Gay-Lussac’s Law

[object Object],[object Object],Combined Gas Law Problem List what you know: P 1 = 0.800 atm V 1 = .180 L T 1 = 302 K P 2 = 3.20 atm V 2 = .090 L T 2 = ??

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Calculations T 2 = 604 K

[object Object],[object Object],Ideal Gas Law PV = nRT

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Using the Ideal Gas Law L * atm mol * K

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Ideal Gas Calculation

[object Object],[object Object],Ideal Gas Calculation RT RT n = 1082 mol How many grams of N 2 is this? 1082 mol * (28 g/ 1mol) = 30,296 g!

[object Object],[object Object],[object Object],[object Object],[object Object],Dalton’s Law of Partial Pressure

Diffusion ,[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Effusion

[object Object],Rates of Effusion & Diffusion Thomas Graham, 1805-1869. Professor in Glasgow and London. Rate of effusion is inversely proportional to molar mass. High mass = low speed Low mass = high speed

Gas Laws

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