Question

Predict whether the equilibria

Answer 1

Answer:

The correct answer is option 4.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

For exothermic reaction :ΔH = negative

• If the temperature is increased, so according to the Le-Chatlier's principle , the equilibrium will shift in the direction where decrease in temperature occurs.So, equilibrium will move in backward direction.
• If the temperature is decreased , so according to the Le-Chatlier's principle , the equilibrium will shift in the direction where increase in temperature occurs.So, equilibrium will move in forward direction.

For the given equation:

I) $CO_2(g) + 2 NH_3(g) \leftrightharpoons CO(NH_2)_2(s) + H_2O(g)$ ,ΔH° = -90 kJ

On Increasing the temperature

This is an exothermic reaction, backward reaction will decrease the temperature. Hence, the equilibrium will shift in the left direction that is towards reactants.

II) $Ni(s) + 4 CO(g)\leftrightharpoons Ni(CO)4(g)$ ,ΔH° = -161 kJ

On Increasing the temperature

This is an exothermic reaction, backward reaction will decrease the temperature. Hence, the equilibrium will shift in the left direction that is towards reactants.