Question

QUESTION 7 One would expect the lattice energy for Mgo to be less than that for Naf because Mg2+ and 02 have greater charge than Na and F. (Hint: Consider Coulomb's Law.) True False QUESTION 8 Which of the following would not be considered an ordered solid? a gold bar leather a graphite battery electrode sugar (sucrose) table salt

Answer 1

False >>>>>answe

The lattice energy of MgO = 3795KJ/mole

The lattice energy of NaF    = 910KJ/mole

MgO has greater lattice energy than NaF because of Mg^2+ has small size than Na^+

lattice energy is inversely proportional to sum of radius of cation and radius of anion

question 8

leather >>>>answer

leather is Amorphous solid. It has short range order.

gold ,graphite , sugar, table salts are long range order. They are crystalline solids.