Question

Predict the effect of the following changes on the reaction

H2 (G) + CO2 (g) <---> H2O (g) +CO (g) . Delta H= 90.0 kcal

(a) Adding CO2

(b) Adding H20

(c) Increasing the temp.

(d) Decreasing the volume of the container

Answer 1

a)
we are adding a reactant
According to Le Chatelier's Principle,
Adding reactant will shift reaction towards product side
Answer: Equilibrium moves to product side

b)
we are adding a product
According to Le Chatelier's Principle,
Adding product will shift reaction towards reactant side
Answer: Equilibrium moves to reactant side

c)
Forward reaction is endothermic in nature
we are increasing temperature or adding heat here
so, according to Le Chatelier's principle,
equilibrium will move in direction which absorbs heat
hence, forward reaction will be favoured
Answer: Equilibrium moves to product side

d)
We are decreasing volume here
In other words we are trying to increase pressure
so, according to Le Chatelier's principle,
Reaction will try to decrease the pressure
Hence it will move in a direction which have lesser gaseous molecules