The equilibrium constant

Question 1

What is partial pressure?

Answer 1

• each gas contributes to total pressure
• this is called its partia pressure p
  
  • pressure that the gas would exert if it occupied the container on its own

= mole fraction x total pressure

Question 2

What is the mole fraction?

Answer 2

• mole fraction = no of moles of gas A / total number of moles of gas in the mixture

Question 3

What is K_p?

Answer 3

• partial pressure of gases on right side / partial pressure of gases on left
  
  • at eqm
• for a reaction
  
  • aA (g) + bB (g) ⇌ yY (g) + zZ (g)
• K_p = ( p^yY(g)_eqm p^ZZ(g)_eqm ) / ( p^aA(g)eqm p^bB(g)_eqm )

Question 4

What is the effect of changing temperature?

Answer 4

• Le chateliers
• depends which side most moles are and whether the reaction is exothermic