Convert energy between kJ/mol, J/mol, MJ/mol, kcal/mol, and eV per atom using the exact SI-based molar conversion factor.

Per atom assumes the mole refers to atoms. For a mole of molecules, the same conversion gives eV per molecule. Signed energy changes retain their sign.

Energy Conversion Formula

The following formula is used to convert energy between kJ/mol and eV/atom.

EeV / atom = (EkJ / mol × 1000) / (NA × e)

Variables:

  • (E_{eV/atom}) is the energy in electron volts per atom
  • (E_{kJ/mol}) is the energy in kilojoules per mole
  • (N_A) is Avogadro’s constant, exactly 6.02214076 × 1023 mol−1
  • The numerical factor e is 1.602176634 × 10−19 J/eV, the exact electronvolt-to-joule conversion

To convert energy from kJ/mol to eV/atom, multiply the energy in kJ/mol by 1000, then divide by the product of Avogadro’s constant and 1.602176634 × 10−19 J/eV. Per-atom results assume the mole refers to atoms; a mole of molecules gives the same numerical result per molecule.

kJ/mol to eV/atom Conversion Table
kJ/mol eV/atom
10.010364
20.020729
50.051821
100.103643
150.155464
200.207285
250.259107
300.310928
400.414571
500.518214
600.621856
750.777320
1001.036427
1501.554641
2002.072854
2502.591068
3003.109282
4004.145709
5005.182136
100010.364272
* Rounded to 6 decimals. Conversion constants: 1 eV/atom = 96.485332 kJ/mol; 1 kJ/mol = 0.010364272 eV/atom.

What is Energy Conversion?

Energy conversion is the process of changing energy from one form to another. In the context of chemistry and physics, it often involves converting energy units to make calculations and comparisons easier. For instance, converting energy values between kJ/mol and eV/atom is common in the study of molecular and atomic interactions. This conversion is essential for understanding and comparing the energy changes that occur during chemical reactions and physical processes at the atomic and molecular levels.

How to Calculate Energy Conversion?

The following steps outline how to calculate the energy conversion between kJ/mol and eV/atom.

  1. First, determine the energy in kJ/mol (if given).
  2. Next, determine Avogadro’s number ((N_A)).
  3. Next, determine the elementary charge ((e)).
  4. Use the formula to convert the energy to eV/atom.
  5. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Energy in kJ/mol = 100

Avogadro’s constant NA = 6.02214076 × 1023 mol−1 (exact)

Electronvolt-to-joule factor = 1.602176634 × 10−19 J/eV (exact)