Question

Deriving concentrations from data The equilibrium constant, K, of a reaction at a particular temperature is detemined by the concentrations or pressures of the reactants and products at equilibrium. In Part A, you were given the equilibrium pressures, which could be plugged directly into the formula for K. In Part B however, you will be given initial concentrations and only one equilibrium concentration. You must use this data to find all three equilibrium concentrations before you can apply the formula for K. For a gaseous reaction with the general form Part B the Ke and Kp expressions are given by The following reaction was performed in a sealed vessel at 745 °C H2(g) +I2(g)2H) A B Initially, only H2 and 12 were present at concentrations of H23.50M and 2.65M. The equilibrium concentration of Iz is 0.0400 M. What is the equilibrium constant, K, for the reaction at this temperature? Express your answer numerically The subscript c or p indicates whether K is expressed in terms of concentrations or pressures. Equil brium-constant expressions do not include a term for any pure solids or liquids that may be involved since their composition does not change throughout the reaction. The standard state of a pure substance itself, and although the quantity may change the sample remain pure. The concentration is effectively equal to 1 and will not impact the magnitude of K View Available Hint(s) substance is the pure K688.09 Submit Incorrect: Try Again; 4 attempts remaining

Answer 1