Chem 141N Week 8 Notes
Chem 141N Week 8 Notes CHMY 141N - 00
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This 1 page Class Notes was uploaded by Isabella Sturgeon on Sunday October 25, 2015. The Class Notes belongs to CHMY 141N - 00 at University of Montana taught by Mark Cracolice (P) in Fall 2015. Since its upload, it has received 15 views. For similar materials see College Chemistry I in Chemistry at University of Montana.
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Date Created: 10/25/15
Chemistry 141 Week 8 Notes Lesson 18 This lesson demonstrates how to use the density of a gas and what the significance of the density is Essentially you will use stoichiometry and gas laws to solve any problems that uses gasses and other phases Density m PV RT mm This is a modification of the ideal gas law PVN RT It can be rewritten using algebra to solve for mass over volume which is density m MMP 17 RT This is the molar mass times pressure over the gas constant times temperature Molar Volume Is the amount of volume per mole of gas V RT n P This is found by the gas constant time the temperature divided by pressure Lesson 20 This lesson is essentially all about energy Once again stoichiometry will be used only this time the amount of heat in the balanced chemical equation can be used as a conversion factor There are also a couple new conversions to keep in mind calorie to Calorie and calorie to joule Conversions 1000 calories 1 Calorie 4184 Joules 1 calorie Understand the concept of work I like to think of it as the amount of work being done on an object Exothermic releases heat into the surroundings so it will feel hot this have a negative enthalpy when regarding the system Endothermic takes in heat from the surroundings so it feels cold and has a positive enthalpy The first law of thermodynamics is AEqw
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