Question

The reaction below is at equilibrium at a temperature T. There are four possible changes listed. Select all the changes that will shift the equilibrium so as to produce more products

                                    MgO(s) + SO3(g) + 95 kJ   <======> MgSO4(s)

I – Increase the temperature               

II – Increase the volume

III – Add more MgO

IV – Remove SO3

Answer 1

I)

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

II)

We are increasing volume here

In other words we are trying to decrease pressure

so, according to Le Chatelier's principle,

Reaction will try to increase the pressure

Hence it will move in a direction which have more gaseous molecules

Here reactant has more gaseous molecule

So equilibrium will move to left

Answer: Equilibrium moves to reactant side

III)

Adding solid or liquid doesn't affect equilibrium

Answer: No effect on equilibrium

IV)

we are removing a reactant

According to Le Chatelier's Principle,

Removing reactant will shift reaction towards reactant side

Answer: Equilibrium moves to reactant side

Answer: I