CHEM 1620 Chapter Notes - Chapter 17: Reaction Quotient, Equilibrium Constant, Partial Pressure

• School: University of Virginia
• Department: Chemistry
• Course: CHEM 1620
• Professor: Metcalf Dave

Document Summary

At equilibrium state: reactants (a) and products (b) will coexist in a certain ratio i. e no change in concentration of a and b unless perturbed. They have reached a steady-state condition: forward and reverse reaction will occur at the same rate, can be reached from either direction: from products or reactants. Keq >>1 a lot of product/product driven. Keq <<1 a lot of reactant/reactant driven. Keq around 1 balanced amounts of product and reactant. Directionality can be quantified by using the reaction quotient. A reaction quotient (q) is not the same as. If q< keq , system will proceed towards the product side. If q> keq , system will proceed towards the reactant side. If q = k, system will be in equilibrium. Converting between conc and partial pressures in gas phase eq. const expressions. The equilibrium constant is defined in terms of standard states. For gases, the standard state is the pure gas at a pressure of 1 atm.