19 Questions
What is the expression for the rate of the forward reaction in a reversible reaction?
r1 = k1 [A]a [B]b
What is the condition for a system to be in equilibrium?
The rate of the forward reaction is equal to the rate of the reverse reaction
What is the equilibrium constant expression for a reaction?
𝐊𝐜 = [𝐂]𝐜 [𝐃]𝐝/[𝐀]𝐚 [𝐁]𝐛
What do the exponents a, b, c, and d represent in the equilibrium constant expression?
The coefficients of the balanced equation
What is the significance of a larger K value in a reaction?
The concentrations of the products of the forward reaction are greater than those of the reactants.
What is the equilibrium constant expression for the reaction N2 (g) + 3 H2 (g) 2 NH3 (g)?
Kp = (pNH3)^2/(pN2)(pH2)^3
What is the unit of the equilibrium constant Kc?
Unitless
In a heterogeneous equilibrium, what happens to the concentration of a pure solid or liquid?
It is constant under constant conditions.
What is the significance of a smaller K value in a reaction?
The concentrations of the products of the forward reaction are less than those of the reactants.
What is the physical interpretation of the equilibrium constant Kc?
It is the ratio of the concentrations of products to reactants
What is the relationship between the rates of forward and reverse reactions at equilibrium?
The rate of the forward reaction is equal to the rate of the reverse reaction
What is the mathematical expression for the rate of the reverse reaction?
r2 = k2 [C]c [D]d
What is the condition for which the equilibrium constant Kc is a constant?
k1 and k2 are both constants
What is the significance of the equilibrium constant expression?
It describes the ratio of the concentrations of products to reactants
A reaction has an equilibrium constant expression of Kc = [HI]2/[H2][I2]. Which of the following statements is true?
The reaction involves only gases
For the reaction CaCO3 (s) → CaO (s) + CO2 (g), what is the reason why the concentrations of solid CaCO3 and CaO do not appear in the equilibrium constant expression?
Because their concentrations are constant under constant conditions
For a reaction with an equilibrium constant Kp, which of the following statements is true?
Kp is equivalent to Kc for reactions involving only gases
In the reaction 2 SO2 + O2 → 2 SO3, if Kc is greater than 1, what can be inferred about the reaction?
The equilibrium position lies more to the right
For the reaction H2 (g) + CO2 (g) → H2O (g) + CO (g), if Kc is 0.771 at 750°C, what can be inferred about the reaction?
The reaction favors the reactants
Understand the concept of equilibrium constant and reaction quotient expression in reversible reactions. Learn how to apply the law of mass action to determine the relationship among concentrations of reactants and products.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
