a) (2 marks) Consider the Born-Haber cycle for NaF(s). Determine if the following values expressed as A,H values should be positive, negative or zero. Circle the correct answer. b) (1

mark) Order NaF(s), NaCl(s), NaBr(s), and MgO{s) in order of lattice energy magnitude from least exothermic to most exothermic.