Write the conditions to maximize the yield of `H_(2)SO_(4)` by contact process.

Explanation

The key step in the manufacture of `H_(2)SO_(4)` is catalytic oxidation of `SO_(2)` to produce `SO_(3)` in presence of `V_(2)O_(5)`.
`2SO_(2(g))+O_(2)(g)overset(V_(2)O_(5),)overset(720" K",2" bar")iff2" SO"_(3)(g),DeltaH=-196.6" kJ mol"^(-1)`
The reaction is exothermic, reversible and the forward reaction reaction results in the decrease in volume. Thus according to Le-Chatelier's principle, the forward reaction should be favoured by low temperature and high pressure. But the tempeerature should not be very low otherwise the rate of reaction will become very slow.