Use this chemistry calculator to reproduce a named relationship with explicit quantities and units for study, laboratory planning, or an independent numerical check.

dH formation (kJ/mol)

Required number input.

dH sublimation (kJ/mol)

Required number input.

IE (kJ/mol)

Required number input.

Half D(X2) (kJ/mol)

Required number input.

Electron attachment enthalpy (kJ/mol)

Required number input.

Solve the signed lattice formation enthalpy from a Born-Haber cycle, using a signed electron-attachment enthalpy (normally negative). The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Lattice energy (kJ/mol)

The resulting lattice energy returned as a number.

• Crystallographic calculations assume the stated ideal lattice, indexing, wavelength, occupancy, and unit-cell geometry. Defects, strain, texture, thermal expansion, mixed phases, and instrumental corrections are outside the compact model.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check units and significant figures, compare the result with limiting cases, and use measured or source-specific constants where available. Laboratory, safety, and regulatory decisions require validated methods and appropriate uncertainty analysis.

• Heat of Solution Calculator

  Compute solution enthalpy as lattice dissociation enthalpy plus hydration enthalpy, using positive energy to separate the lattice and signed hydration enthalpy.

• BDE Average

  Compute the average bond dissociation enthalpy by dividing a total bond energy over the number of bonds.

• Crystal Field Stabilization Energy Calculator

  Compute the octahedral crystal field stabilization energy in units of the ligand field splitting Delta-o from the t2g and eg electron counts: CFSE = (-0.4*n(t2g) + 0.6*n(eg)) * Delta-o.