Workshop equilibrium: A) write an expression for the equilibrium constant K1 for

Question

Workshop equilibrium: A) write an expression for the equilibrium constant K1 for following: oo AT&T; 10:35 AM 12874-presscdn-0-89.pagely.netdna-cdn.com 97%. General Chemistry ! Workshop 1: Equilibrium Today we are going to think about equilibrium expressions. To do this, we will consider the equilibriurn for the formation of ammonia gas: N2 (g) + 3 Hz (g)-2 NHDg) As the reaction proceeds the N2 and Hz begin to react with one another to form NHs. When this happens the concentration of and H2 will begin to decrease and the concentration of NHs will begin to increase. These concentrations will keep changing until they reach equilibrium, at which point the relative concentrations stop changing. We can write equilibrium expressions for every single equilibrium reaction, using the ratio of the concentrations of species present at equilibrium, where in general K = [Products}|Reactantsr For the formation of ammonium gas, K-INHINl[Hl') When using concentrations that are not at equilibrium K is thought of as the reaction quotient Q and the expression is written as Q INHlIN:IH:) The numerical value of K can be changed in the following ways: (1) When you reverse a reaction the value of Krew is the inverse of K for the original reaction (2) When you multiply the stoichiometric coefficients in a reaction by N, K is raised to the power of N Kuwhe (3) When you add 2 reactions together the new K is the product of the K's for the reactions you are adding Now try and solve some problems(10 pts total) 1. (a) Write an expression for the cquilibrium constant (Ki) for the following reaction: Reaction 1:4NH () 502()4NO ()+6H-0 () (b) Write an expression for the equilibrium constant (K) for Reaction 2 in terms of Kr Reaction 2:2NO (R) 3H20 (1)2NH, () 2.502 e)

Explanation / Answer

K1 = [NO]4 [H2O]6 / [NH3]4 [SO2]

K2 = [NH3]2 [SO2]2 / [NO]2 [ H2O]3 = 1 / K1

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