109k views
6 votes
The melting points for the compounds Li2S, Rb2S, and K2S are 900, 500, and 840 degrees C, respectively. Give the three compounds in order of increasing lattice energy

1 Answer

1 vote

Answer:
Rb_2S <
K_2S <
Li_2S

Step-by-step explanation:

Lattice energy is the energy required to dissociate 1 mole of the an ionic compound into its constituent ions.

Thus higher is the lattice energy more energy will be required to melt the compounds.

As
Li_2S has highest melting point, it will require most energy to melt an hence it will have highest lattice energy. The order of three compounds in order of increasing lattice energy


Rb_2S <
K_2S <
Li_2S

User Ken Gentle
by
7.5k points