The heat of solution of calcium chloride CaCl₂ is -82.8 kJ/mol, and the combined heats of hydration of 1.00 mole of gaseous calcium ions and 2.00 mole of gaseous chloride ions is -2327 kJ. What is the lattice energy of calcium chloride A) 2,144 kJ/mol B) 2,244 kJ/mol C) 2,344 kJ/mol D) 2,444 kJ/mol E) None of the above

Question

Quizplus · Accepted Answer

The lattice energy can be calculated using the formula: Lattice Energy = Heat of Hydration - Heat of Solution. Substituting the given values: Lattice Energy = -2327 kJ/mol - (-82.8 kJ/mol) = -2327 kJ/mol + 82.8 kJ/mol = -2244.2 kJ/mol, which is approximately 2,244 kJ/mol.

The Heat of Solution of Calcium Chloride CaCl2 Is -82

The Heat of Solution of Calcium Chloride CaCl₂ Is -82