Ionic Or Electrovalent Bond
Chapter Name : Chemical Bonding And Molecular Structure |
Sub Topic Code : 102_11_04_03_02 |
Topic Name : Ionic Or Electrovalent Bond |
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Sub Topic Name : Lattice Enthalpy |
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Introduction
• 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 ions.
Pre-Requisites:
Chemical bond, ionic bond, lattice
Activity:
Observe how ionic bonds form between elements giving rise to ionic compounds e.g. NaCl. Common salt. Also see how the bond between Na and Cl break.
Real Life Question:
How would NaCl break into Na and Cl ?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Ionic bond | Bond formed when transfer of electrons takes place between atoms. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Pebbles | Use pebbles to draw the NaCl crystal lattice. |
Real life uses :
Lattice enthalpy helps to break the bonds between ionic solids.
Places to visit :
Kitchen
Practical examples around us
| Examples | Explainations |
|---|---|
| Common salt | Sodium chloride is formed due to formation of ionic bond between sodium and chloride. |
What you learn in Theory:
• Lattice Enthalpy of an ionic solid is defined as the energy required to completely separate one mole of a solid ionic compound into gaseous ions.
What you learn in Practice:
Energy is required to break the ionic bonds.