Answer to Question #213044 in General Chemistry for Alaa Aboukhadra

Question

For a reaction system at chemical equilibrium that contains a gas

 the total moles affect the value of Kp

the equilibrium constant must always be represented as Kp

the equilibrium constant must may be represented as Kc or Kp

 the difference in moles between the two sides for all species affect the value of Kp

there is a mathematical relationship between Kp and Kc due to the combined gas law

 the difference in moles between the two sides for all gas species affect the value of Kp

there is a mathematical relationship between Kp and Kc due to the ideal gas law

the equilibrium constant must always be represented as Kc

Answer 1

Because the pressure of gases is related directly to the concentration by P = n/V, changing the pressure by increasing/decreasing the volume of a container will disturb an equilibrium system.