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

Lattice dissociation enthalpy (kJ/mol)

Required number input.

dH hydration (kJ/mol)

Required number input.

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

dH solution (kJ/mol)

The resulting dh solution returned as a number.

• Thermodynamic quantities are state- and temperature-dependent and must use consistent reference states and sign conventions. Heat loss, phase changes, non-ideal mixing, path-dependent work, and heat-capacity variation may need separate treatment.
• 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.

• Born-Haber Lattice Energy Calculator

  Solve the signed lattice formation enthalpy from a Born-Haber cycle, using a signed electron-attachment enthalpy (normally negative).

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

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  Compute heat of combustion from bomb calorimeter as q = C_cal * dT.