Consider the reaction represented by the equation: 2SO(_{2(g)}) + O(_{2(g)}) 2SO(_{3(g)}). (Delta)H = 188KJ.
(a) Write an expression for the equilibrium constant
(b) Sketch an energy diagram for the forward reaction, showing the profile for the catalyzed and non-catalyzed systems.
(c) state the reason, the effect of the following on the position of equilibrium of the system:
(i) increase in temperature
(ii) increase in pressure;
(iii) removal of some of the SO(_3) produced;
(iv) presence of V(_2)O(_5)
(d)(i) Write equations to show how the sulphur(VI) oxide is converted to tetraoxosulphate(VI) acid in the contact process
(ii) Give two uses of tetraoxosulphate(VI) acid.
Explanation
(a) Equilibrium constant (Kc) = (frac{[SO_3]}{[SO]^2 times [O_2]})
(b) The reaction profile; 2SO(_{2(g)}) + O(_{2(g)}) (to) 2SO(_{3(g)})
(c)(i) (i) Increase in temperature low of SO(_{3(g)}) because the contact proc Decrease in temperature favour E more SO(_{3(g)}).
(ii) Increase in pressure favour the more production of SO(_{3(g)}) because of moles is present in the prod reactant side of the overall read process.
(iii) Removal of some of the SO(_{3(g)}) produced will favour the forward flow of the Chatelier’s principle about Equilibrium
(iv) Presence of V(_2)O(_5), it acts as a fasten the more production SO(_{3(g)}) temperature.
(d) Step I: 2SO(_{2(g)}) + O(_{2(g)}) (to) 2SO(_{3(g)}) (Contact process)
Step II: H(_2)SO(_{4(aq)}) + SO(_{2(g)}) (to) 2H(_2)S(_2)O(_{7(aq)}) Oleum fuming liquid conc
Step III: H(_2)S(_2)O(_{7(aq)}) + 2H(_2)O(_{(l)}) (to) 2H(_2)SO(_{4(aq)}) tetraoxosulphate (VI) acid
(ii) Tetraoxosulphate (IV) acid can be used for the manufacture of paints and pigment. It can also be used for making detergents and soap.