A - Level H2 Chemistry 2021 Paper 3 Answers !!exclusive!!

(b) Give an example of a heterogeneous catalyst used in the Haber process.

Calculating the enthalpy change of formation or lattice energy. To solve this, students needed to draw a mental (or written) Born-Haber cycle. A Level H2 Chemistry 2021 Paper 3 Answers

Solubility depends on the balance between Lattice Energy ( ΔHlatcap delta cap H sub l a t end-sub ) and Hydration Energy ( ΔHhydcap delta cap H sub h y d end-sub The Answer Path: As ionic radius increases, both ΔHlatcap delta cap H sub l a t end-sub ΔHhydcap delta cap H sub h y d end-sub become less exothermic. However, ΔHhydcap delta cap H sub h y d end-sub decreases more significantly than ΔHlatcap delta cap H sub l a t end-sub (b) Give an example of a heterogeneous catalyst