Question 6: The following questions concerm this equilibrium system How will the

Question

Question 6: The following questions concerm this equilibrium system How will the following factors infiuence the equilibrium listed above? Indicate the system will shift left, right, or remain unchanged and give a short explanatice your choice. Simply citing Le Châtelier's principle is not an adequate answer explain why the system does or does not respond to the stress using your the collision theory and chemical kinetics (rates of forward and backward reaction all cases, the listed change is the only change- all other variables (P. V, or T) re constant. (Total: 7 points; 1 point each) (a) Increasing the temperature (b) Increasing the pressure in the flask by adding Ar (c) Increasing the volume of the flask (d) Adding Br2(0) (e) Removing Cla(g) (1) Adding BrCl(g) (g) Adding a catalyst

Explanation / Answer

(a) The  H of the reaction is positive indicating that the reaction is endothermic, hence more
heat is liberated on reactants side therefore if you increase temperature the equilibrium will
shift to the direction opposite to the effect i.e) equilibrium shift happens towards right direction.
(b) If you add more Ar gas molecules then the number of gas molecules will increase on products
side hence the equilibrium will shift towards right direction.
(c) Increasing the volume of the flask results in decrease of number of moles of gases on products
side, hence the equilibrium will shift toward left. (Always the reaction equilibrium shifts towards
more number of gaseous moles)
(d) Shift always happens opposite to effect during addition so, if you add more Br2 the shift will
  occur towards right direction.
(e) Removing Cl2(g) will result in equilibrium shift towards left direction since the shift takes place in
the direction of minimizing effect during removal.
(f) Shift always happens opposite to effect during addition so, if you add more BrCl(g) the shift will
  occur towards left direction.
(g) Adding a catalyst will not alter or decide the position or direction of equilibrium hence no effect.
  

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