topic 11 Flashcards
what does it mean if the value of Kc is greater than 1?
the position of equilibrium is on the right hand side
what does it mean if the value of Kc is less than 1?
the position of equilibrium is on the left hand side
how do you calculate molar fraction?
number of moles of substance/ total number of moles of all substances present
how do you calculate partial pressure?
molar fraction x total pressure
what is the effect of increasing temperature on the equilibrium constant value in an exothermic reaction?
decreases equilibrium constant value
what is the effect of increasing temp on the equilibrium constant in an endothermic reaction?
increase value of equilibrium constant
what happens if the added gas is a product to the value of Kp?
value of numerator in the Kp expression increases
the equilibrium shifts to the left
what happens if the added gas is a reactant?
the value of the denominator increases
equilibrium shifts to the right
what is the effect of increasing pressure on Kp?
no effect on Kp value but causes shifts in the equilibrium
this is because the partial pressure ratio of product to reactant stays the same
how do you convert from kPa to MPa
divide by 1000
what is the definition of a homogenous reaction?
when all of the reactants and products are in the same phase
what is the definition of a heterogenous reaction?
reactions that have reactants in two or more phases including those which take place on the surface of a catalyst of a different phase
how do you convert from dm3 to m3?
divide by 1000
what does it mean if Kc is 1
the conc of reactants and products are equal
why isnt there a partial pressure value for solids
they dont contribute to overall pressure of the system
