Equilibrium Constant Kp

• Who is the presenter of the video on AQA equilibrium constant KP?

  Chris Harris
• What is the focus of the video on AQA equilibrium constant KP?

  Information specific to AQA chemistry
• What type of resources has Chris Harris created for AQA chemistry?

  Videos, whiteboard tutorials, and past paper walkthroughs
• Why does Chris Harris encourage viewers to subscribe?

  To support continued content creation
• What is the total pressure in the equilibrium reaction vessel mentioned?

  714 kiloPascals
• How is partial pressure represented in the context of the video?

  With a lowercase 'p' and curly brackets
• How do you calculate the partial pressure of a gas?

  By using total pressure and individual pressures
• What is the relationship between the partial pressures of reactants and products at equilibrium?

  They must balance to equal total pressure
• What is the mole fraction of a gas?

  The proportion of a gas in a mixture
• What is the formula for calculating the mole fraction of a gas?

  Number of moles of gas divided by total moles
• How do you calculate the partial pressure using mole fraction?

  Mole fraction times total pressure
• What is the purpose of an ICE table in equilibrium calculations?

  • Organizes initial moles, changes, and equilibrium moles
  • Helps visualize the stoichiometry of the reaction
  • Aids in calculating equilibrium concentrations or pressures
• Why are the initial moles of SO2 and Cl2 zero?

  They haven't formed yet at the start
• How do you determine the change in moles for SO2 and Cl2?

  Based on the stoichiometry of the reaction
• What happens to the moles of reactants during the reaction?

  They decrease as products form
• How do you find the partial pressure of SO2Cl2?

  Mole fraction times total pressure
• What are the key steps in calculating equilibrium pressures using mole fractions?

  1. Determine initial moles of each gas
  2. Use ICE table to track changes
  3. Calculate equilibrium moles
  4. Find mole fractions
  5. Calculate partial pressures
• What can be calculated using equilibrium moles?

  Mole fraction and partial pressure
• How is the mole fraction of SO2Cl2 calculated?

  By dividing moles of SO2Cl2 by total moles
• What is the mole fraction of SO2Cl2 if there are 1.25 moles and total moles are 4.75?

  $0.263$
• How is partial pressure calculated?

  By multiplying mole fraction by total pressure
• What is the partial pressure if the mole fraction is $0.263$ and total pressure is $7.14 \text{ kPa}$?


  $188 \text{ kPa}$
• What is the KP equilibrium constant used for?

  To calculate gas equilibrium using partial pressures
• What is the difference between KP and KC?

  KP uses partial pressures, KC uses concentrations
• How is the KP expression formulated?

  Products' partial pressures over reactants' partial pressures
• What is the KP expression for the reaction $2A +$$B \rightleftharpoons C +$$D$?


  $K_P =$$\frac{P_C \cdot P_D}{P_A^2 \cdot P_B}$
• What is the KP value if $P_A =$$324 \text{ kPa}, P_B =$$162 \text{ kPa}, P_C =$$182 \text{ kPa}, P_D =$$182 \text{ kPa}$?


  $1.95 \times 10^{-3}$
• Why must equilibrium figures be used for KP calculations?

  Because KP is defined at equilibrium conditions
• How are units for KP determined?

  By canceling units of partial pressures
• What happens to KP if temperature changes?

  KP changes with temperature variations
• How does increasing temperature affect KP for an exothermic reaction?

  It decreases KP as equilibrium shifts left
• What does Le Chatelier's principle state about temperature changes?

  The system shifts to counteract the change
• What happens to equilibrium if temperature is decreased in an exothermic reaction?

  Equilibrium shifts right, increasing KP
• How does pressure affect the value of KP?

  KP is unaffected by pressure changes
• What is the effect of adding a catalyst on KP?

  Catalysts do not affect the value of KP
• What role do catalysts play in reactions?

  They speed up the rate of reaction
• What is the main takeaway about KP compared to KC?

  KP is similar to KC but uses partial pressures