Question

In a reversible reaction, when the rate of the forward reaction equals the rate of the reverse reaction, the reaction is at ________.

If K_c is the equilibrium constant for a forward reaction what is K_c^' for the reverse reaction?

	Kc
	-Kc
	(Kc)-1
	none of these

Write the equilibrium constant expression for the following reaction in the forward direction:
2 CH₄ (g) + 3 O₂ (g) ⇋ 2 CO (g) + 4 H₂O (g)

Write the equilibrium constant expression for the following reaction in the forward direction:
2 CH₄ (g) + 3 O₂ (g) ⇋ 2 CO (g) + 4 H₂O (g)

Kc=[CH4]2[O2]3[CO]2[H2O]4

Kc=2[CO]+4[H2O]2[CH4]+3[O2]

Kc=[CO]2[H2O]4[CH4]2[O2]3

Kc=2[CH4]+3[O2]2[CO]+4[H2O]

As a rule, which of the following phases are not included in the equilibrium constant expression?
I. pure liquids II. pure solids III. aqueous solutions IV. gases

As a rule, which of the following phases are not included in the equilibrium constant expression?
I. pure liquids II. pure solids III. aqueous solutions IV. gases

	III, IV
	I, II
	I, IV
	II, III

"If a stress is applied to a reaction mixture at equilibrium, the reaction occurs in the direction that will relieve the stress." This statement is called

"If a stress is applied to a reaction mixture at equilibrium, the reaction occurs in the direction that will relieve the stress." This statement is called

Le Châtelier's principle.

the First Law of Thermodynamics.

the Law of Combining Volumes.

the Law of Mass Action.

A catalyst increases the overall rate of reaction by lowering the activation energy, E_a, for

A catalyst increases the overall rate of reaction by lowering the activation energy, E_a, for

	only the reverse reaction.
	both the forward reaction and the reverse reaction.
	neither the forward reaction nor the reverse reaction.
	only the forward reaction.

Answer 1