Chemistry Help?

Question

1. keq for the reaction 2 h2o(g) > 2 H2(g) + O2(g) is 2.9 x 10^-82. What does the value of keq reveal about the reaction? Suppose a container holds 1.55 M H2o(g). 7.00 x 10^-23 M H2(g), and 4.72 x 10^-15 M O2(g), Is the system at equilibrium? If not, in what direction will he reaction proceed?


2. Given the equation OF2(g) + H2O(g) >< O2(g) + 2 HF(g) + 318 kJ. predict the direction of shift in the equilibrium position if (a) OF2 is added. (b) H2O is removed (c) pressure is increased, and (d) temperature is loered. In each case, briefly explain your answer.

Answer 1

1. This Keq indicates that the equilibrium is shifted far to the left, and very little decomposition of water vapor is expected.
2. If you set up and solve the equation for Keq, the value obtained will NOT equal Keq. It is greater, indicating that the equilibrium is reached by reaction of oxygen and hydrogen to form water.

3. Assume that equilibrium has been obtained. OF2 addition will cause more products to be formed.
H2O removal will cause products to reform reactants.
A pressure increase causes products to reform reactants.
Lowering of temp causes products to reform reactants.