why not AlF3
Lattice enthalpy of an ionic solid depends on two
Size of atom: Smaller the size of ions lesser is the
internuclear distance will be high and lattice
enthalpy will also be large.
Charge on the atoms: Larger the magnitude of the
charge on ions greater will be the attractive forces
between the ions and the lattice enthalpy increases
In your question AIN have higher charge so the
lattice enthalpy will be more Al3+ and N3- i.e they
are truevalent ions so the magnitude of charge is more
consequently the lattice enthalpy will be more as
compared to AlF3
You can also see by fajan rule that alN is more covalent.
@sneha-sameera in AlF3 and AlN cation is same so by comparing anion N3- will be larger in size than F- so it will have low lattice enthalpy is it?? Explain please
aln more covalent charecter, higher energy to break bond
@nukita-puyol but what about size of N3- and F-????
Harshal Patil last edited by
@ankita-maurya charge factor dominates size factor