Answer to Question #180707 in Physical Chemistry for Zachary Jordan

Question

The lattice energy for KCl is -715 kJ/mol and this is the energy given off (a negative number) when this lattice forms. We are interested in the opposite process, when the lattice is disrupted. Using the lattice energy value (absolute value), calculate the energy required to separate the ions in 25.00g of KCl (MW = Molar mass 74.555 g/mol). Report your answer with 1 decimal place.

Answer 1

Energy required to separate the ions;

=934kJ/mol