The Equilibrium Constant

• What is Kp used for?

  Kp is the equilibrium constant used for gaseous equilibria
• What is required for Kp to be calculated?

  All reactants and products must be in a gaseous state
• What is the definition of partial pressure?

  Partial pressure is the pressure exerted by a single gas in a mixture of gases

  
• How is the partial pressure of a substance found?

  It is found using the molar fraction of that substance and the total pressure
• How is the partial pressure of A represented?

  The partial pressure of A is shown as (pA)

  
• If the total moles in a system are 1.31, what is the molar fraction of H2 if it has 0.28 moles?

  The molar fraction of H2 is $0.21$
• What is the partial pressure of H2 if its molar fraction is 0.21 and the total pressure is 2.35 atm?

  The partial pressure of H2 is $0.50 \text{ atm}$
• In what units are partial pressures commonly measured?

  Partial pressures are commonly measured in Pascals
• What does Kp allow us to find in a gaseous equilibrium?

  Kp allows the value of Kp for a gaseous equilibrium to be found
• How is Kp calculated?

  Kp is equal to the product of the partial pressures of products over the partial pressures of reactants
• How does Kp relate to the variation in moles?

  Any variation in moles raises the partial pressure to a power equal to the number of moles
• What is the relationship between Kp and Kc?

  Kp is similar to Kc in its calculation method