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Chapter 17: Q17.6P (page 775)

For a given reaction at a given temperature, the value of K is constant. Is the value of Q also constant? Explain.

Short Answer

Expert verified

The answer is,

Yes

Step by step solution

01

Equilibrium constant and reaction quotient

The equilibrium constant can be defined as the ratio of the concentration of products to the ratio of the concentration of the reactants. The equilibrium constant is equal to the reaction quotient when the system is at equilibrium.

02

Explanation

The reaction quotient Q is the ratio of the concentration of the products and the reactants. It is a quantity of relative amount of reactant and products at a given time and at a particular temperature. Hence the reaction quotient is a constant at a particular temperature and is equal to the equilibrium constant at equilibrium.

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Most popular questions from this chapter

What does “disturbance” mean in Le Châtelier’s principle?

For the reaction M2+N2⇌2MN, scene A represents the mixture at equilibrium, with Mblack and Norange. If each molecule represents0.10mol and the volume is localid="1656945725597" 1.0L , how many moles of each substance will be present in scene B when that mixture reaches equilibrium?

The molecular scenes below depict the reaction Y⇌2Z at four different times, out of sequence, as it reaches equilibrium. Each sphere (Y is red and Zis green) represents0.025mol and the volume is0.40L .

(a) Which scene represents equilibrium?

(b) List the scenes in the correct sequence.

(c) CalculateKc .

Is K very large or very small for a reaction that goes essentially to completion? Explain.

An inorganic chemist places 1 mol of BrCl in container A and 0.5 mol of Br2 and 0.5 mol of Cl2 in container B. She seals the containers and heats them to 3000C. With time, both containers hold identical mixtures of BrCl, Br2, and Cl2.

(a) Write a balanced equation for the reaction in container A.

(b) Write the reaction quotient, Q, for this reaction.

(c) How do the values of Qin A and in B compare over time?

(d) Explain on the molecular level how it is possible for both containers to end up with identical mixtures.
See all solutions

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