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Question

Lattice enthalpy is the change in energy that occurs when _____ of an ionic solid is sepearted into isolated ions in the gas phase.

A
one gram
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B
one mole
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C
one gram atom
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D
one gram molecule
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Solution

The correct option is D one mole
Lattice enthalpy is the change in energy that occurs when one mole of an ionic solute is separated into isolated ions in gas phase.
The greater the charge densities of ions the more they attract each other and the larger the lattice enthalpy.

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