Reversible Reactions and Equilibrium

Question 1

The reaction below is at dynamic equilibrium.Which statement is true for the equilibrium system?

Revolt · Accepted Answer

The rate of the forward reaction equals the rate of the reverse reaction.

Question 2

Error

Question 3

Consider the equilibrium system below.If the system is at dynamic equilibrium, which statement is true?

Revolt · Accepted Answer

The rate of sublimation of the NH4CI crystals is equal to the rate of solidification of the NH4CI vapors.

Question 4

Carbon monoxide (CO) reacts with hydrogen (H2) to form methane (CH4) and water (H2O).The reaction is at equilibrium at 1,000 K. The equilibrium constant of the reaction is 3.90. At equilibrium, the concentrations are as follows.[CO] = 0.30 M[H2] = 0.10 M[H2O] = 0.020 MWhat is the equilibrium concentration of CH4 expressed in scientific notation?

Revolt · Accepted Answer

5.9 x 10-2

Question 5

Consider the reaction.At equilibrium at 600 K, the concentrations are as follows.[HF] = 5.82 x 10-2 M[H2] = 8.4 x 10-3 M[F2] = 8.4 x 10-3 MWhat is the value of Keq for the reaction expressed in scientific notation?

Revolt · Accepted Answer

2.1 x 10-2

Question 6

Which statement correctly defines dynamic equilibrium?

Revolt · Accepted Answer

At dynamic equilibrium, the rates of forward and reverse reactions are equal.

Question 7

Consider the following reversible reaction.What is the equilibrium constant expression for the given system?

Revolt · Accepted Answer

K subscript e q equals StartFraction StartBracket upper H subscript 2 EndBracket superscript 2 StartBracket upper O subscript 2 EndBracket over StartBracket upper H subscript 2 upper O EndBracket superscript 2 EndFraction.

Question 8

Consider the reaction.At equilibrium, the concentrations are as follows.[NOCl] = 1.4 ´ 10–2 M[NO] = 1.2 ´ 10–3 M[Cl2] = 2.2 ´ 10–3 MWhat is the value of Keq for the reaction expressed in scientific notation?

Revolt · Accepted Answer

1.6 ´ 10–5

Question 9

Consider the reaction below.If the reaction is at dynamic equilibrium at 500 K, which statement applies to the given chemical system?

Revolt · Accepted Answer

The concentrations of the products and reactants do not change.

Question 10

Consider the reaction below.At 500 K, the reaction is at equilibrium with the following concentrations.[PCI5]= 0.0095 M[PCI3] = 0.020[CI2] = 0.020 MWhat is the equilibrium constant for the given reaction?

Revolt · Accepted Answer

0.042

Reversible Reactions and Equilibrium Answers

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