Compare the Difference Between Similar Terms

Difference Between

Home / Science & Nature / Science / Chemistry / Physical Chemistry / Difference Between Bond Enthalpy and Lattice Enthalpy

Difference Between Bond Enthalpy and Lattice Enthalpy

November 24, 2019 Posted by Madhu

The key difference between bond enthalpy and lattice enthalpy is that the bond enthalpy is the amount of energy that is required to break down a chemical bond, whereas the lattice energy is the amount of energy that is required to form one mole of an ionic compound from the cations and anions in the gaseous state.

Both these terms describe energy exchange between a system and its surrounding. Bond enthalpy is the opposite of the lattice enthalpy. Bond enthalpy explains bond breaking while lattice enthalpy explains bond formation. This is why they are opposite phenomena to each other.

CONTENTS

1. Overview and Key Difference
2. What is Bond Enthalpy 
3. What is Lattice Enthalpy
4. Side by Side Comparison – Bond Enthalpy vs Lattice Enthalpy in Tabular Form
5. Summary

What is Bond Enthalpy?

Bond enthalpy is the amount of energy that is required to break down a chemical bond. If we apply the standard definition here, it says that bond enthalpy is the enthalpy change when one mole of bonds are broken in a substance at 298 K. Since this term deals with bond breaking, we can name it as bond dissociation energy as well. Other synonyms include bond strength and average bond energy.

Key Difference - Bond Enthalpy vs Lattice Enthalpy

Figure 01: Bond Energies of Some Chemical Bonds

If the value of bond enthalpy is high, it means the bond is very strong and difficult to break down. Hence, it requires more energy to break down that particular bond. Typically, the units that we use for the determination of the value for bond enthalpy is kcal/mol (kilocalories per mole) or kJ/mol (kiloJoules per mole).

What is Lattice Enthalpy?

Lattice enthalpy is the amount of energy that is required to form one mole of an ionic compound under standard conditions using the cations and anions in the gaseous state. Since we are dealing with crystal lattices here, the term lattice enthalpy is used for crystal lattices; in other words, it is applied for solid compounds. It is a measure of the forces that bind the ions together (the cohesive forces).

Difference Between Bond Enthalpy and Lattice Enthalpy

Figure 02: A Lattice Structure

Generally, lattice energy is important in the determination of some physical properties, including solubility of crystals, hardness and volatility. Typically, lattice energy is a negative energy, but lattice enthalpy is a positive value. This is because the volume of a mole of the crystalline solid decreases when forming the lattice.

What is the Difference Between Bond Enthalpy and Lattice Enthalpy?

Bond enthalpy is the process opposite to lattice enthalpy since bond enthalpy deals with bond breaking while lattice enthalpy deals with bond forming. Hence, the key difference between bond enthalpy and lattice enthalpy is that bond enthalpy is the amount of energy that is required to break down a chemical bond whereas lattice energy is the amount of energy that is required to form one mole of an ionic compound from the cations and anions in the gaseous state. Bond enthalpy is the enthalpy change when one mole of bonds is broken in a substance at 298 K. Therefore, we can call it as bond dissociation enthalpy as well.

Difference Between Bond Enthalpy and Lattice Enthalpy in Tabular Form

Summary – Bond Enthalpy vs Lattice Enthalpy

Bond enthalpy deals with bond breaking while lattice enthalpy deals with bond forming. Hence, the key difference between bond enthalpy and lattice enthalpy is that bond enthalpy is the amount of energy that is required to break down a chemical bond whereas lattice energy is the amount of energy that is required to form one mole of an ionic compound from the cations and anions in the gaseous state.

Reference:

1. Helmenstine, Anne Marie. “Bond Enthalpy Definition in Chemistry.” ThoughtCo, Aug. 8, 2019, Available here.
2. “Bond Energy.” Wikipedia, Wikimedia Foundation, 4 Nov. 2019, Available here.
3. “Lattice Energy.” Wikipedia, Wikimedia Foundation, 11 Nov. 2019, Available here.

Image Courtesy:

1. “Bond energies” By Chem540f09grp8 – Own work (Public Domain) via Commons Wikimedia
2. “Sodium-chloride-3D-ionic” By Benjah-bmm27 (talk · contribs) – Own work (Public Domain) via Commons Wikimedia

Related posts:

Difference Between Electrochemical Cell and Galvanic CellDifference Between Electrochemical Cell and Galvanic Cell Difference Between Homogeneous and Heterogeneous EquilibriumDifference Between Homogeneous and Heterogeneous Equilibrium Difference Between Rate Expression and Rate LawDifference Between Rate Expression and Rate Law Difference Between Anodic and Cathodic ProtectionDifference Between Anodic and Cathodic Protection Difference Between Photochemical and Thermal ReactionDifference Between Photochemical and Thermal Reaction

Filed Under: Physical Chemistry

About the Author: Madhu

Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. With a mind rooted firmly to basic principals of chemistry and passion for ever evolving field of industrial chemistry, she is keenly interested to be a true companion for those who seek knowledge in the subject of chemistry.

Leave a Reply Cancel reply

Request Article

Featured Posts

Difference Between Alzheimers and Dementia

Difference Between Alzheimers and Dementia

Difference Between Which and What

Difference Between Which and What

Difference Between To and For in English Grammar

Difference Between To and For in English Grammar

Difference Between Then and Than in English Grammar

Difference Between Then and Than in English Grammar

You May Like

Difference Between Freud and Jung

Difference Between Freud and Jung

Difference Between Mitochondria and Plastids

Difference Between Mitochondria and Plastids

Difference Between Diagnosing and Troubleshooting in Computers

Difference Between With and Along With

Difference Between With and Along With

Difference Between Know and No

Latest Posts

  • Difference Between Salt Bridge and Hydrogen Bond
  • Difference Between Sodium Cyanide and Potassium Cyanide
  • Difference Between Crystal Field Stabilization Energy and Splitting Energy
  • Difference Between Carbon Cycle and Phosphorus Cycle
  • Difference Between Differentiation and Morphogenesis
  • Difference Between Free Radicals and Reactive Oxygen Species
  • Home
  • Vacancies
  • About
  • Request Article
  • Contact Us

Copyright © 2010-2018 Difference Between. All rights reserved. Terms of Use and Privacy Policy: Legal.