Chem Equilibria

Question 1

Defn of reversible rctns

Answer 1

Rctns that proceed in both the forward and backward directions

Question 2

Defn of dynamic eqm

Answer 2

refers to a state in a reversible system in which the rates of the forward and backward rctns are continuing at the same rate, resulting in no net change in macroscopic properties (eg conc, partial pressure) of the rcts and prods

Question 3

Eqm can only be achieved in a ___ system

Answer 3

Closed system, one which does not allow matter to enter or leave but allows free transfer of energy

Question 4

Eqn for rate of forward/backward rctn

Answer 4

rate = k[A][B]

Question 5

Rctn Quotient

Answer 5

At any given time, aA+bB ⇌cC +dD

            c           d
      [C]          [D]  Qc = --------------------------   , where [ ] are the conc in 
           a            b             mol/d^-3 at any given time
      [A]          [B]

Question 6

Eqm constant

Answer 6

c d
[C] eqm [D] eqm
Kc = ——————————- , where [ ] eqm of _ are the
a b conc in mol/d^-3 at eqm
[A] eqm [B] eqm

Question 7

Defn of position of eqm

Answer 7

Relative composition (eg conc) of the products and rcts present in a rctn mixture at eqm