NCEA Lvl 2 - Changes to Systems at Equilibrium

Descripción

Includes pressure changes in gaseous systems, temperature, concentration and addition of a catalyst.
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Resumen del Recurso

Pregunta 1

Pregunta
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?
Respuesta
  • No effect
  • The forward reaction becomes favored
  • The reverse reaction becomes favored

Pregunta 2

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

Pregunta 3

Pregunta
An increase in temperature will do what to a system at equilibrium?
Respuesta
  • 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

Pregunta 4

Pregunta
An increase in the concentration of the products results in an increase in the value of Kc
Respuesta
  • True
  • False

Pregunta 5

Pregunta
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.
Respuesta
  • True
  • False

Pregunta 6

Pregunta
Increasing the concentration of A will do what to the following system at equilibrium? A + B <-----> C + D
Respuesta
  • 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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