Consider the following:
1) Constant temperature,
2) Equal concentrations of reactants and products,
3) Equal rates of forward and backward reactions. A system at equilibrium must have:
2 and 3 only.
1 and 3 only.
1, 2 and 3.
1 and 2 only.
A catalyst has no effect on the position of equilibrium. This is because:
All are correct.
It increases the rates of both the forward and backward reactions to different extents
It does not affect rates of both the forward and backward reactions
It increases the rates of both the forward and backward reactions to the same extent
Which of the following statements is correct as the system proceeds towards equilibrium?
A net backward reaction occurs because Qc > Kc.
A net forward reaction occurs because Qc > Kc.
A net backward reaction occurs because Qc < Kc.
A net forward reaction occurs because Qc = Kc.
The principle that relates changes imposed on equilibrium systems to equilibrium position is:
The law of chemical equilibrium.
Le Chatelier's principle.
Avogadro's principle.
Haber's principle.
Which of the following represents the value for the activation energy of the forward endothermic reaction in an equilibrium system?
Ea(forward) = Ea(reverse) - (ΔH).
Ea(forward) = -Ea(reverse) - (ΔH).
Ea(forward) = Ea(reverse) + (ΔH).
Ea(forward) = (ΔH) - Ea(reverse).
