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JEE Advanced2013ChemistryChemical EquilibriumActual

The thermal dissociation equilibrium of CaCO 3 s ⁡ is studied under different conditions. CaCO 3 s ⁡ ⇌ CaO s ⁡ + CO 2 g For this equilibrium, the correct statement(s) is/are

Options

  1. A∆ H is dependent on T .
  2. BK is independent of the initial amount of CaCO 3 .
  3. CK is dependent on the pressure of CO 2 ​ at a given T .
  4. D∆ H is independent of the catalyst, if any.

Correct answer

A. ∆ H is dependent on T .

Step-by-step solution

Kirchoff's Equation- Δ H T = Δ H ∘ + ∫ 298 T Δ Cp reac dT Δ H reac is dependent on temperature. K = CO 2 × 1 1 as solids are treated at unit activity. K is independent of initial amount of CaCO 3 . K p = pCO 2 ( g ) at a given temperature K p depends only on temperature. Δ H = E a for - E b back A catalyst lowers only the activation energies & Δ H react is independent of catalyst.

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