18 Questions
What is the relationship between the equilibrium constant Kp and Kc?
Kp = Kc (RT)∆n
What does a value of K >> 1 indicate about the reaction?
The reaction is product-favored
Why does the equilibrium constant remain the same regardless of the initial concentrations of reactants and products?
Because the equilibrium constant is a ratio of concentrations
What is the significance of ∆n in the equation Kp = Kc (RT)∆n?
It represents the difference in moles of gaseous reactants and products
What happens to the equilibrium when K < 1?
The equilibrium shifts to the left
What is the implication of the equilibrium constant being the same regardless of the direction of the reaction?
The reaction is reversible, and can be reached from either direction
What is the condition for a system to be in chemical equilibrium?
The forward and reverse reactions are proceeding at the same rate
What is the relationship between the rate constants kf and kr at equilibrium?
kf / kr = Keq
What is the equilibrium expression for the reaction aA + bB cC + dD?
Keq = [C]c[D]d / [A]a[B]b
What is the purpose of the double arrow in a chemical equation at equilibrium?
To indicate that the reaction is reversible
What is the relationship between the equilibrium constants Kc and Kp?
Kc = Kp
What is the rate law for the forward reaction N2O4 (g) 2 NO2 (g)?
Rate = kf [N2O4]
When a system at equilibrium is disturbed by a change in temperature or pressure, what happens to the equilibrium position?
It shifts to counteract the effect of the disturbance
What is the effect of adding more of a reactant to a system in equilibrium?
The equilibrium shifts to the right
What is the purpose of removing ammonia (NH3) from the system in the Haber Process?
To shift the equilibrium to the right
What is the effect of a catalyst on a system in equilibrium?
It increases the rate of both the forward and reverse reactions
What happens to the equilibrium constant (K) when the temperature of a system is increased?
It remains constant
What is the relationship between the equilibrium constant (K) and the rate of the forward reaction?
K is independent of the rate of the forward reaction
This quiz is based on Chapter 15 of 'The Central Science' 10th edition, covering the concept of chemical equilibrium, where the forward and reverse reactions proceed at the same rate.
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