Partial pressures at equilibrium

At this temperature, K = 0.0169. What are the partial pressures at equilibrium of the hydrogen and iodine if initially a sealed flask at 800 K contains only HI at a pressure of0.200 atm ... 

If we start with hydrogen and oxygen, equilibrium is attained after most of the hydrogen and oxygen have united to form water. More important, though, the partial pressures at equilibrium are the same as those obtained beginning with pure H20. The equilibrium pressures are fixed by the temperature, the composition, and the total pressure they do not depend upon the direction from which equilibrium is approached. The balanced equation does not indicate the concentrations (or partial pressures) at equilibrium. 

The complete partial pressures at equilibrium are in the last column. 

Here AGr° is the Gibbs free energy change in the ideal gas phase reaction system when all the gases are in their respective standard states. The equilibrium constant Kp is given in terms of the partial pressures at equilibrium by... 

Step 4 Use the equilibrium constant to determine the value of x, the unknown molar concentration or partial pressure at equilibrium. A good habit is to check the answer by substituting the concentrations or pressures into the expression for K. 

Because NH3 and HCl are formed in equimolar amounts, they will have the same partial pressure at equilibrium. The equilibrium expression is... 

Let X be the initial pressure of NOBr. Using the balanced equation, we can write expressions for the partial pressures at equilibrium. 

When the reaction is at equilibrium, the quantity AjG is equal to zero. The relationship between partial pressures at equilibrium can be deduced from equations (36) and (37) ... 

We shall apply the law of mass action expressed in relation to the partial pressures at equilibrium. In order to do so, we note that ... 

The table shows the initial partial pressures and the partial pressures at equilibrium of hydrogen, iodine and hydrogen iodide. The total pressure was constant throughout the experiment. 

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