Lattice Energy Calculator
Determine the lattice energy of an ionic crystal using the Born-Haber cycle parameters.
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Calculation Parameters
Adjust the values below.
-1000 kJ/mol0
0300 kJ/mol
1001200 kJ/mol
50500 kJ/mol
-500 kJ/mol0
Calculated Result
Lattice Energy (U)
-787.5 kJ/mol
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Expert Tip
Ensure units are correctly formatted (e.g. Kelvin for gas temperatures and liters for volumes) to get chemically accurate outputs.
How this Calculator Works
This calculator allows you to solve Lattice Energy problems dynamically. Adjust the input parameters using the sliders or selection menu below:
- Enthalpy of Formation (ΔHf, kJ/mol) (Range: -1000 to 0, Default: -411)
- Enthalpy of Sublimation (ΔHsub, kJ/mol) (Range: 0 to 300, Default: 107)
- Ionization Energy (IE, kJ/mol) (Range: 100 to 1200, Default: 496)
- Bond Dissociation Energy (D, kJ/mol) (Range: 50 to 500, Default: 243)
- Electron Affinity (EA, kJ/mol) (Range: -500 to 0, Default: -349)
The results are computed instantly and updated in the results panel on the right.
Formula & Methodology
U = ΔHf - (ΔHsub + IE + 0.5 * D + EA)
Where:
- Enthalpy of Formation: Parameter value.
- Enthalpy of Sublimation: Parameter value.
- Ionization Energy: Parameter value.
- Bond Dissociation Energy: Parameter value.
- Electron Affinity: Parameter value.
Step-by-Step Calculation Example
To calculate Lattice Energy manually, follow these steps:
- Identify the input parameters. For example:
- Enthalpy of Formation (ΔHf, kJ/mol) = -411
- Enthalpy of Sublimation (ΔHsub, kJ/mol) = 107
- Ionization Energy (IE, kJ/mol) = 496
- Bond Dissociation Energy (D, kJ/mol) = 243
- Electron Affinity (EA, kJ/mol) = -349
- Apply the formula:
U = ΔHf - (ΔHsub + IE + 0.5 * D + EA)
- Verify the calculated value which is updated instantly in the results panel on the right.