devarshi-dt-logo

Question:

The thermal dissociation equilibrium of CaCO3(s) is studied under different conditions. CaCO3(s)⇌CaO(s)+CO2(g) For this equilibrium, the correct statement(s) is (are): ΔH is dependent on T, K is independent of the initial amount of CaCO3, K is dependent on the pressure of CO2 at a given T, ΔH is independent of the catalyst, if any

K is independent of the initial amount of CaCO3

ΔH is independent of the catalyst, if any

ΔH is dependent on T

K is dependent on the pressure of CO2 at a given T

Solution:

(A) The expression for the enthalpy change is ΔH=CpΔT and for spontaneity of the reaction ΔG should be negative. Hence, the enthalpy of the reaction is temperature-dependent.