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Q.5-Define (a) Lattice Enthalpy (b) Bend Order. |
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Answer» (I) Lattice Enthalpy:-The lattice energy of a crystalline solid is a measure of the energy released when ions are combined to make a compound. It is a measure of the cohesive forces that bind ions. Lattice energy is relevant to many practical properties including solubility, hardness, and volatility. (ii)Bond number is the number of electron pairs between a pair of atoms. For example, in diatomic nitrogen N≡N the bond number is 3, in acetylene H−C≡C−H the bond number between the two carbon atoms is also 3, and the C−H bond order is 1. Bond number gives an indication of the stability of a bond. |
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