CHE 1302 Lecture Notes - Lecture 9: Reaction Quotient, Equilibrium Constant, Chemical Equation
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Baker | che 1302 | summer 2017 | lecture 9 | page 1. (cid:1829)(cid:1853)(cid:1841)(cid:4666)(cid:1871)(cid:4667)+(cid:1829)(cid:1841)(cid:2870)(cid:4666)(cid:1859)(cid:4667)(cid:1374)(cid:1829)(cid:1853)(cid:1829)(cid:1841)(cid:2871)(cid:4666)(cid:1871)(cid:4667: (cid:1837)(cid:3030)= (cid:2869)[(cid:3118), remember from yesterday that the reverse of a reaction has an inverse kc. The reaction quotient: predicting the direction of change. For a reaction that is not yet at equilibrium we need to know in which direction (forward or reverse) the reaction will proceed in order to reach equilibrium: use the reaction quotient (q) The expression for qc or qp has the same form as kc or kp but applies to non-equilibrium: note: q is not a constant for a reaction, it applies to non-equilibrium conditions. To determine the direction of the net change, compare the magnitude of qc and kc conditions: (cid:1843)(cid:3030)= [(cid:3043)(cid:3045)(cid:3042)(cid:3031)(cid:3048)(cid:3030)(cid:3047)(cid:3046)] Baker | che 1302 | summer 2017 | lecture 9 | page 2. If qc < kc: the reaction moves in the forward direction (towards products) to reach equilibrium.
