{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

burge_ch11_notes

burge_ch11_notes - Chapter 11 Gases 2011 Donald L Siegel...

Info icon This preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
©2011 Donald L. Siegel, All Rights Reserved Chapter 11 Chapter 11 Gases
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
©2011 Donald L. Siegel, All Rights Reserved States of Matter States of Matter W Solid - definite shape W Liquid - fluid, adopts the shape of the container that holds it, incompressible W Gas - fluid, fills the entire container, compressible W Other rarer states Plasma - sea of ions and electrons, found in stars
Image of page 2
©2011 Donald L. Siegel, All Rights Reserved Molecular Model of Gases Molecular Model of Gases W A model in science is a simplification we use to describe complicated phenomena. W The model is to treat molecules as separate, unreactive spheres No interactions other than to bounce off each other or the walls Rapid motion ~300 m/s. Collisions transfer momentum Volume of particles negligible
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
©2011 Donald L. Siegel, All Rights Reserved
Image of page 4
©2011 Donald L. Siegel, All Rights Reserved More on the Model More on the Model W While each molecule is traveling with a random speed and direction, there is an average speed (kinetic energy ½mv 2 ) The average speed is determined by the temperature Temperature and kinetic energy are 2 forms of the same thing.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
©2011 Donald L. Siegel, All Rights Reserved Kinetic Model Kinetic Model - - Review Review W Molecules behave independently W Volume of particles is insignificant W Particles travel in straight lines until collisions change direction W Particles have no effect on each other except to collide
Image of page 6
©2011 Donald L. Siegel, All Rights Reserved Distribution of Speeds Distribution of Speeds W Kinetic model says average kinetic energy determined by temperature W It doesn’t mean that every molecule has the same speed W It’s the average that’s fixed by the temperature Different kinds of averages (see later) <E k > = ½m<v> 2 = 3/2RT u=(3RT/M) 1/2
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
©2011 Donald L. Siegel, All Rights Reserved Maxwell Distribution Maxwell Distribution
Image of page 8