Chem 106 Chapter 17 Textbook Notes
Chem 106 Chapter 17 Textbook Notes Chem 106
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This 2 page Class Notes was uploaded by Maranda Butterfield on Monday October 26, 2015. The Class Notes belongs to Chem 106 at Washington State University taught by Nathalie Wall in Fall 2015. Since its upload, it has received 16 views. For similar materials see Principles of Chemistry II in Chemistry at Washington State University.
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Date Created: 10/26/15
171 172 173 174 175 177 Chapter 17 No important information Spontaneous process occurs Without ongoing outside intervention 0 Increases entropy of universe EntropyS thermodynamic function that increases With the number of energetically equivalent ways to arrange the components of a system to achieve a particular state 0 S 21 1n W W is the number of possible microstates that can result in a given macrostate 0 Increase When matter changes from a solid to a liquid and from a liquid to a gas AS ASWAS univ surr An exothermic process increases the entropy of surroundings An endothermic process decreses the entropy of surroundings A H m A Ssurr T constant pressure amp temperature Gibbs Free Energy 0 AGAH TAS A G is proportional to the negative of A Sum39v Decreasing energy means a spontaneous process Increasing energy means a nonspontaneous process Standard entropy change for a reaction 0 A Sxn S o 0 products reactants o AS90122 npS pr0ducts Z an reactants Standard Free Energy Changes 178 179 Aagz RTHAK lnK A Gxn A HZXTL T A 5167 A Gm Z an products Z n Greactants If a chemical equation is multiplied by some factor then A ern is also multiplied by the same factor If a chemical equation is reversed then A ern changes sign If a chemical equation can be expressed as the sum of a series of steps then A ern for the overall equation is the sum of the free energies of reactions for each step Free energy change of a reaction under nonstandard conditions AszAG RTmD K is equilibrium constant A Sim R 0 AH rxn R i T