30 Questions
What is a characteristic of reversible reactions?
They have a tendency to attain a state of equilibrium
What is an example of a reversible reaction?
Neutralisation between an acid and a base either of which or both are weak
What is the significance of the sign ⇌ in a reaction?
It represents the reversibility of the reaction
What is the characteristic of an irreversible reaction?
The free energy change is always less than zero
What is an example of an irreversible reaction?
Thermal decomposition of MnO2
What is the effect of increasing temperature on the solubility of CaCl₂?
Solubility decreases
What is the effect of adding a catalyst on the equilibrium of a reaction?
Equilibrium remains unaffected
What is the condition for no change in equilibrium when the pressure of the system is changed?
Δn = 0
What is the effect of removing NH₃ on the equilibrium of the Haber's process?
Equilibrium shifts to the right
What is the effect of high pressure on the equilibrium of the formation of nitrogen dioxide?
Equilibrium shifts to the right
What is an irreversible reaction?
A reaction in which entire amount of the reactants is converted into products
What is the key characteristic of a reversible reaction?
The reaction proceeds in both forward and backward directions
What happens to the concentration of reactants in a chemical reaction?
It decreases with time
What is the characteristic of a reaction that occurs in a state of equilibrium?
The reaction is balancing forward and backward reactions
How are chemical reactions classified based on the extent to which they proceed?
Into two classes: reversible and irreversible reactions
At equilibrium, what is the relationship between the rate of the forward reaction and the rate of the reverse reaction?
The rate of the forward reaction is equal to the rate of the reverse reaction
What is the effect of multiplying a chemical equation by a coefficient on the equilibrium constant?
The equilibrium constant is raised to the power of the coefficient
What is the relationship between Kp and Kc when Δn = 0?
Kp = Kc
What is the unit of Kp when Δn ≠ 0?
atm
What is the characteristic of the equilibrium state in a closed vessel?
It is dynamic in nature
What is the primary difference between homogeneous and heterogeneous equilibrium reactions?
The phase of the reactants and products.
What is the significance of the concentration quotient (Q) in relation to the equilibrium constant (K)?
Q equals K when the reaction is at equilibrium.
If Q > K, what will happen to the reaction?
The reaction will proceed in the direction of reactants.
What is the relationship between Kp and Kc?
Kp and Kc are equal at equilibrium.
What are the units of the equilibrium constant Kc?
Dimensionless.
What is the relationship between the standard free energy change of a reaction and its equilibrium constant?
ΔG° = -2.303 RT log K
For a reaction aA + bB ⇌ cC + dD, what is the correct expression for the equilibrium constant K?
K = (aC)c (aD)d / (aA)a (aB)b
What is the unit of equilibrium constant Kc for a reaction aA + bB ⇌ cC + dD?
M^(c+d-a-b)
What is the relationship between the equilibrium constants Kp and Kc for a reaction aA + bB ⇌ cC + dD?
Kp = Kc × (RT)^Δn
For a reaction at equilibrium, what is the condition for no change in equilibrium when the pressure of the system is changed?
Δn = 0
Test your knowledge of reversible and irreversible reactions, including their characteristics, examples, and chemical equations. Identify the key differences between these two types of reactions and understand their importance in chemistry.
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