State the typical conditions for the conversion of sulfur dioxide to sulfur trioxide in the Contact process as (450^circ C), (200kPa/2 atm) and a vanadium(V) oxide catalyst

Describe and explain the effect on the rate of reaction of: (a) changing the concentration of solutions (b) changing the pressure of gases (c) changing the surface area of solids (d) changing the temperature (e) adding or removing a catalyst, including enzymes using collision theory