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Nancy Cope

on 10 May 2013

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Transcript of Equilibrium

Equilibrium a system in which the rate of the forward reaction is equal to the rate of the reverse reaction what does this mean? products are being formed from reactants at the same speed as reactants are being formed from products. eq K = [products] [reactants] equilibrium constant the ratio of the product of the concentration of the products raised to their coefficients to the product of the concentration of the reactants raise to their coefficients. 2NH (g) 3H (g) + N (g) 2 K = eq [NH ] [H ] [N ] K = eq [H O][CO ] [H CO ] H O(g) + CO (g) H CO (g) 2 2 2 3 2 3 2 2 Why is water included? Le Chatelier's Principle Three stresses:
pressure If a stress is imposed on a system at equilibrium, the system will shift to relieve the stress What effects the rate of the reaction? Temperature
Particle Size
Concentration Concentration Molarity is a measure of concentration expressed as moles of solute per liter of solution 3 ⇔ 2 2 3 2 2 3 Equilibrium does not mean nothing is happening. That is a static situation. Equilibrium is dynamic. There are reactions happening, but nothing is changing overall.
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