NCEA Lvl 2 - Changes to Systems at Equilibrium

Description

Includes pressure changes in gaseous systems, temperature, concentration and addition of a catalyst.
Kerrin _
Quiz by Kerrin _, updated more than 1 year ago
Kerrin _
Created by Kerrin _ almost 8 years ago
11
2

Resource summary

Question 1

Question
What effect does increasing the pressure of a closed gaseous system at equilibrium have on the state of equilibrium if the forward reaction creates 2 mol and the reverse reaction creates 3 mol?
Answer
  • No effect
  • The forward reaction becomes favored
  • The reverse reaction becomes favored

Question 2

Question
The addition of a catalyst to a system at equilibrium will increase the concentration of the products of the forward reaction.
Answer
  • True
  • False

Question 3

Question
An increase in temperature will do what to a system at equilibrium?
Answer
  • Shift the equilibrium to favor the endothermic reaction.
  • Change the Kc value (equilibrium constant)
  • Increase the concentration of products produced by the endothermic reaction
  • All of the above

Question 4

Question
An increase in the concentration of the products results in an increase in the value of Kc
Answer
  • True
  • False

Question 5

Question
Le Chatelier's principle states that when stress is placed on a system at equilibrium the system will work in such a way that reduces this stress.
Answer
  • True
  • False

Question 6

Question
Increasing the concentration of A will do what to the following system at equilibrium? A + B <-----> C + D
Answer
  • The system will shift to favor the reverse reaction so that the concentration of B will become equal to A
  • The system will shift to favor the forward reaction to reduce the increase in concentration of A
  • The system will not be affected
  • The Kc constant will decrease
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