Question

According to Le Chatelier's principle adding heat to a solid and liquid in equilibrium with endothermic nature will cause the :

• A. mass of solid to decrease
• B. mass of liquid to decrease
• C. temperature to rise
• D. temperature to fall

Answer 1

Answer: (A)

mass of solid to decrease

According to Le Chatelier's principle adding heat to a solid and liquid in equilibrium with endothermic nature will cause the mass of solid to decrease.

Solid $\rightleftharpoons$ Liquid; $\Delta H=+ve$;

Increase in temperature favours forward reaction. In endothermic reactions, ( $\Delta H=+ve$) heat is absorbed with the reactants. It means more energy is needed to overcome the forces of attraction between molecules and to separate them from one another than the energy gained when new bonds are formed.