In a system at equilibrium, how do the rates of the forward and reverse reactions compare?
The rate of the forward reaction is greater
The rate of the reverse reaction is greater
The rates of the forwards and reverse reactions are equal
In the Contact Process, sulfur dioxide is converted into sulfur trioxide and the following equilibrium is set up:
\[2SO{2}(g)+O_{2}(g)\rightleftharpoons 2SO_{3}(g)\]
If sulfur dioxide is added to the mixture, what happens to the position of the equilibrium?
The equilibrium shifts to the right
The position of the equilibrium remains unchanged
The equilibrium shifts to the left
If a catalyst is added to the mixture, what happens to the position of the equilibrium?
If the pressure was increased in the above reaction, what happens to the position of the equilibrium?
In the Haber process, ammonia (NH3) can be produced from nitrogen and hydrogen.
\[N_{2}(g)+3 H_{2}(g) \rightleftharpoons 2NH_{3}\,\,(g)(\Delta H=-92.22\,kJ\,mol^{-1})\]
How would increasing the temperature effect the position of equilibrium?
Look at this reaction.
\[CO(g)+ 3H_{2}(g) \rightleftharpoons CH_{4}(g)+H_{2}O(g)\,\, \Delta H=-206kJmol^{-1}\]
What would be the best conditions for increasing the yield of methane?
Low temperature; low pressure
Low temperature; high pressure
High temperature; high pressure
\[Br_{2}(l)+H_{2}O(l) \rightleftharpoons Br^{-}(aq)+BrO^{-}(aq)+2H^{+}(aq)\]
If hydrochloric acid is added to the mixture, what will happen to the position of equilibrium?
If sodium hydroxide is added to the mixture, what will happen to the position of equilibrium?
Which of the following factors would not affect the equilibrium position for the reaction shown?
\[AgCl(s) \rightleftharpoons Ag^{+}(aq)+Cl^{-}(aq)\]
Addition of silver nitrate
Increasing the pressure
Removal of chloride ions
Which of the following is true of equilibrium when a catalyst is added?
It changes the position at equilibrium
Equilibrium will be reached more quickly
No effect on the reaction at all