The thermal dissociation equilibrium of `CaCO_(3) (s)` is studied under different conditions
`CaCO_(3) (s) hArr CaO(s) + CO_(2) (g)`
For this equilibrium , the correct statements are : `Delta H` is dependent on T, K is dependent on the pressure of `CO_(2)` at a given T, K is independent of the initial amount of `CaCO_(3)`, `Delta H` is independent of the catalyst, if any

Options

A. `Delta H` is dependent on T
B. K is dependent on the pressure of `CO_(2)` at a given T
C. K is independent of the initial amount of `CaCO_(3)`
D. `Delta H` is independent of the catalyst, if any

Answer

A, C, D

Explanation

`Delta H` is dependent on T. `Delta H` varies with temperature according to Kirchoff equation Equilibrium constant of a reaction depends only on temperature and is independent of the amount of `CaCO_(3)`. For the given reaction, `K = p_(CO_(2))` at a given T. Thus, K is independent of pressure. Catalyst only lowers the activation energy barrier and does not affect the value of `Delta H`.