8. (10 pts) Methanol can be synthesized by combining carbon monoxide and hydroge

Question

8. (10 pts) Methanol can be synthesized by combining carbon monoxide and hydrogen a elevated temperature. CO(g) + 2H2(g) t; CHOH(g) ??%--90.7 kJ (exothermic) A3.0-L reaction vessel contains these compounds at equilibrium. Will the equilibrium shift to the "right or "left" or will it remain "unchanged" if: a. The reaction temperature is decreased to 45 C? b. Additional CO(g) is added to the reaction vessel? c. The volume of the reaction vessel is decreased to 1.0-L d. A catalyst is added to the equilibrium mixture? e. Some methanol is removed from the vessel?

Explanation / Answer

8. This is exothermic reaction, and number of moles is less in product compare to reactants. So,

a. As it is exothermic reaction,so decrease of temperature favour forward reaction. So more product will be formed.

b. Addition of CO(g) would increase the product. From le chatelier principle, if any reagant is added in an equilibrium reaction,then equilibrium is shifted in such a way that decreases excess concentration of that reagent.

c. Volume decrease causes more forward reaction in that case, to decrease number of moles. So more product will be formed.

d. Catalyst not altered equilibrium, it increases the rate of reaction.

e. If some methanol is removed from the vessel,then according le chatelier principle, more product wil be formed to maintain the equilibrium.

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