A-LevelChemistryChemical energeticsOct/Nov 2022Paper 4 Q111 Marks
Calcium chloride, CaCl₂, is an ionic solid. The values of some energy changes are shown in Table 1.1. Table 1.1 energy change | value/kJ mol⁻¹ lattice energy, ∆H°latt, CaCl₂(s) | -2237 standard enthalpy change of atomisation of calcium | +193 first ionisation energy of calcium | +590 second ionisation energy of calcium | +1150 standard enthalpy change of atomisation of chlorine | +121 first electron affinity of chlorine | -364
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