CBSE Class 11-science Answered
What is lattice energy? Which compound NaCl or MgO has higher lattice energy and why?
Asked by Topperlearning User | 07 Oct, 2014, 04:36: PM
Expert Answer
The Lattice Enthalpy of an ionic solid is defined as the energy required to completely separate one mole of a solid ionic compound into gaseous constituent ions.Lattice energy depends on:
- Size of the ions: Small is the size of ion, lesser is the inter-nuclear distance and greater will be the attraction, thus larger will be the magnitude of lattice energy.
- Charge on the ions: More the charge on the ion, higher is the lattice energy.
Between NaCl and MgO, lattice energy of MgO is higher as the positive charge on Mg is higher than Na ion.
Answered by | 07 Oct, 2014, 06:36: PM
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