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This 2 page Class Notes was uploaded by Mikaela Maldonado on Saturday October 17, 2015. The Class Notes belongs to CHEM 113 at Colorado State University taught by Paul Andrew Allegretti in Fall 2015. Since its upload, it has received 21 views.
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Date Created: 10/17/15
O 09 O 0 Le Chatelier s Principle gt Equilibrium shifts to relieve stress on a system it Adding reactantsremoving products decreases Qc shift to the right it Removing reactantsadding products increases Qc shift to the left it Concentration V BIG HINT use a teetortotter with your arm to understand how the shifts work the best Q When adding reactants make the left side of your teetor totter go down because it got heavy compared to the products side gt The reaction has to shift to the right because the right side is higher in order for the reaction to be balanced again Q When removing reactants make the left side go upit is lighter than the products gt The reaction has to shift to the higher side or the left in order to balance it out again V Only gases and aqueous solutions play a role in this influence Pressure V Affect gaseous components V Adding an inert gas has no effect on equilibrium if volume doesn t change O All concentrationspressures must not change V Changing concentration of gas causes equilibrium shifts V Volume changes affect pressure O Decrease in volume increase in pressure Changing temperature gt gt gt JUVV VVVVVVVV Increase in temp adds heat which favors a endothermic reaction Decrease in temp removes heat which favors the exothermic reaction Haber Bosch process it Ammonia synthesis Temp changes the value of the equilibrium constant Pressure changes favor appropriate side with the corresponding moles of gas ICE table helps to quantify unknown values within a Kc Rreaction Initial Concentration Equilibrium Remember to balance Write reaction quotient Convert all amounts into the correct units Working on the reaction table it Compare Qwith K it Construct a reaction table V Check the sign of c change in concentration or pressure Simplifying Assumption it XA reacting can be neglected gt Delta G Delta G naught RT In Q
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