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Unformatted text preview: The relationship between Ke and Kp is the following: Kp = Ke(0.0821x T ) Δn T represents the temperature in Kelvins. Δ n = Change in total number of gaseous moles from the balanced stoichiometric equation ( n products – n reactants). The 0.0821 is the gas constant, R . The units are L-atm/mol-K. Example For the general equilibrium reaction, A(g) + 2B(g) C at 200 °C, the Kp = 4.0 x 10-2. Find Ke Sample Solution Given T = 200 °C = 273 + 200 = 473 K Kp = 4.0 x 10-2 ∆ n = 1 - 3 = -2 Effect of a Temperature Change on the Equilibrium Constant The change in temperature will affect the value of the equilibrium constant in the following ways: For an exothermic reaction: • An increase in temperature will lower the Ke. For an endothermic reaction: • An increase in temperature will raise the Ke....
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This note was uploaded on 07/06/2011 for the course SCH 4U taught by Professor White during the Spring '10 term at Beacon FL.
- Spring '10