Q.
In contact process the formation of SO3 takes place according to the following reaction, 2SO2+O2⇌2SO3;ΔH=−45.2kcal
The formation of SO3 is favoured by
In this reaction ΔH is negative so reaction move forward by decrease in temperature while value of Δn=2−3=−1 i.e., negative so the reaction move forward by increase in pressure.