Statement 1: For CaCO 3 (s) ⇌ CaO(s) + CO 2 (g) in a closed vessel, on decreasing the volume at constant temperature the moles of CO 2 at the new equilibrium are the same as before. Statement 2: K P =

Question

Statement 1: For CaCO 3 (s) ⇌ CaO(s) + CO 2 (g) in a closed vessel, on decreasing the volume at constant temperature the moles of CO 2 at the new equilibrium are the same as before. Statement 2: K P = P CO2 depends only on temperature.

TestHub · Accepted Answer

The solids carry no pressure term, so K P = P CO2 , and this depends only on temperature, so Statement 2 is correct At constant T, P CO2 at the new equilibrium equals its old value n = PV/RT with P and T fixed and V smaller, so n is smaller CO 2 combines with CaO to form CaCO 3 , so the moles of CO 2 decrease, and Statement 1 is incorrect Statement 1 is incorrect and Statement 2 is correct, option (d).

Chemistry - Chemical Equilibrium Question with Solution | TestHub

Options:

Doubts & Discussion