Indicate whether either an increase or a decrease of presure obtained by changing the volume would increase the amount of product in each of the following reactions.
a. CO(g) + 2H2(g) -> <- CH3OH
b. 2SO2(g) + O2(g) -> <- 2SO3(g)
c. COCl2(g) -> <- CO (g) + Cl2 (g)