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What is Lattice Energy in Chemistry?

Overview of Lattice Energy

Last updated date: 25th Mar 2023
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We are surrounded by Chemistry and chemical energy; in fact, we are made of it. Chemical energy is a common occurrence in daily life. A chemical change occurs when chemical compounds act and react at the molecular level. Batteries, food, wood, fireworks, cars, and other goods we use daily contain chemical energy.

Lattice energy is the energy difference between the ionic solids' actual observed energy and their expected experimental value. In more detail, this is the energy difference between the energy of the ionic solid and the energy of the individual gaseous ions. Now let’s understand more about lattice energy in this article.

What is Lattice Energy in Chemistry?

The energy needed to transform one mole of an ionic solid into gaseous ionic components is known as lattice energy. The energy that must be provided to one mole of an ionic crystal in order for it to undergo an endothermic process that separates it into gaseous ions can also be used to characterise it. As a result, this amount has a positive value at all times.

Some sources describe lattice energy in the opposite way, i.e., as the amount of energy released during the exothermic formation of an ionic solid from its gaseous ionic components.

This definition requires that lattice energy always has a negative value.

Lattice Energy

Lattice Energy

What Elements Have an Impact on Lattice Energy?

The amount of charge carried by the constituent ions and the space between them both majorly affect the lattice energy of an ionic combination.

Charge Held by the Constituent Ions

The single ions in an ionic lattice are drawn to one another due to the electrostatic forces between them. The amount of charge that each of the constituent ions carries directly relates to the intensity of the electrostatic force of attraction; thus, the more charge, the stronger the force of attraction and the more rigid the lattice.

The Distance Between the Ions

The spacing between the ions has an inverse relationship with the lattice energy of an ionic molecule. The longer the distance between the ions in a lattice, the weaker the electrostatic forces binding them together and the lower the lattice energy.

Terms of Chemistry


Any solid whose surface regularity mirrors its internal symmentry and whose constituent atoms are arranged in a specific manner.




The observable universe is made up of matter, which, coupled with energy, serves as the foundation for all objective occurrences.

Dual Refraction

A phenomenon in optics where a single unpolarised light beam splits into two beams that go in different directions upon entering an anisotropic medium.

Diffraction of X-rays

A phenomenon where the regular spacing of the atoms in a crystal causes the waves in an incident X-ray beam to interfere with one another.


Compounds made of ionic solids are particularly stable. The approximate strength of the ionic bond is determined by the solid structure's lattice energy. The energy change that occurs during the exothermic process of creating an ionic compound from gaseous ions is known as the lattice energy. It is also known as the endothermic energy required to break down an ionic substance into gaseous ions. Lattice energy measurement is challenging, though.

It is important to know about this as it is the unit of our environment. Through this article, we are aware of the term lattice energy. It is a very important Chemistry topic requiring a thorough reading, so here we are with this article.

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FAQs on What is Lattice Energy in Chemistry?

1. Does lattice energy rise with group size?

The lattice energy diminishes as we enter the group. This is caused by the fact that as ions become larger, the space between their nuclei also grows. The reduced attraction between them ultimately generates less lattice energy throughout the process.

2. Is crystal energy another name for lattice energy?

Because it applies to ionic solids with ions grouped in what is known as a crystal lattice, the type of energy we're talking about is known as lattice energy. There are two ways to express lattice energy, also known as lattice enthalpy. Crystal energy can be defined as the amount of energy that holds a crystal together. 

3. Is lattice energy always positive?

The energy needed to dissolve an ionic solid and transform its constituent atoms into gaseous ions is described as the lattice energy. As a result of this formulation, the lattice energy value is always positive because this reaction will always be endothermic.

4. What are some uses for lattice energy?

The strength of the ionic solids is assessed using lattice energy application, estimation of standard enthalpies formation, and evaluation of the electron and fluoride correlations.

5. Is Diamond a lattice?

Diamond is a crystal structure with two atoms in the basis and a face-centred cubic Bravais lattice.