CEM142 1nd Edition Lecture 5 Outline of Last Lecture I. Reaction mechanismsOutline of Current Lecture II. Chemical equilibriaIII. KIV. Reaction quotientCurrent Lecture-rate forward = k[reactants]-rate reverse = k’[products]-when equilibrium is reached…-K = k/k’ = [products]/[reactants]-deltaGo determines the value of K-deltaG = deltaGo + RTlnQ-deltaGo = -RTlnK-if K is larger than 1, the products are favored, there are more products than reactants-if K is less than 1, the reactants are favored, there are more reactants than products-things to watch out for with K-K is a unitless value-K depends on how we choose the stoichiometry of the reaction-you can find two different values for K using the same equation if you choose to balance the equation using different coefficients-changing the stoichiometry of the reaction changes KThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.-reaction quotient: describes the composition of a system, not necessarily at equilibrium-Q = [products]/[reactants]-K and Q are expressed in partial pressures-Kp = K(RT)deltan-deltan is the change in the number of moles of gas when reactants are converted to
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