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equilibrium-law - Equilibrium Law Introduction to the...

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Equilibrium Law
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Introduction to the Equilibrium law Read 14.3 to PE1 2H 2 (g) + O 2 (g) 2H 2 O (g) Step 1:Set up the “equilibrium law” equation Kc = Step 2:Product concentrations go in numerator [H 2 O] 2H 2 (g) + O 2 (g) 2 H 2 O (g) 2 2 2 H Step 3:Concentration in mass action expression is raised to the coefficient of the product 2 H 2 (g) + O 2 2H 2 O (g) [H 2 ] 2 [O 2 ] Step 4:Reactant concentrations go in denominator Step 5:Concentrations in mass action expression are raised to the coefficients of reactants 2 H 2 2 [O 2 ] Mass action expression Equilibrium constant
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Equilibrium law: important points State (g, l, s, aq) may or may not be added at this point since we will only be dealing with gasses for this section. Later it will matter. The equilibrium law includes concentrations of products and reactants in mol/L (M) The value of Kc will depend on temperature, thus this is listed along with the Kc value Tabulated values of Kc are unitless By substituting equilibrium concentrations into equilibrium law, we can calculate Kc … Do RE 14.31, 35, 36, 37 (pg. 589)
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