Convert Hartree energy to kilocalorie (IT)
Please provide values below to convert Hartree energy [Eh] to kilocalorie (IT) [kcal (IT)], or Convert kilocalorie (IT) to Hartree energy.
1 Eh = 1.0413e-21 kcal (IT). To convert Hartree energy to kilocalorie (IT), multiply the value by 1.0413e-21; to go the other way, divide by it (1 kcal (IT) = 9.6033e+20 Eh). Both units measure energy and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 Eh = 1.0413e-21 kcal (IT)
- 1 kcal (IT) = 9.6033e+20 Eh
- 10 Eh = 1.0413e-20 kcal (IT)
- 100 Eh = 1.0413e-19 kcal (IT)
How to Convert Hartree Energy to Kilocalorie (It)
1 Eh = 1.04130796789911e-21 kcal (IT)
Example: convert 15 Eh to kcal (IT):
15 Eh = 15 × 1.04130796789911e-21 kcal (IT) = 1.56196195184867e-20 kcal (IT)
Hartree Energy to Kilocalorie (It) Conversion Table
| Hartree energy | kilocalorie (IT) |
|---|---|
| 1 Eh | 1.0413e-21 kcal (IT) |
| 2 Eh | 2.0826e-21 kcal (IT) |
| 3 Eh | 3.1239e-21 kcal (IT) |
| 5 Eh | 5.2065e-21 kcal (IT) |
| 10 Eh | 1.0413e-20 kcal (IT) |
| 20 Eh | 2.0826e-20 kcal (IT) |
| 50 Eh | 5.2065e-20 kcal (IT) |
| 100 Eh | 1.0413e-19 kcal (IT) |
| 500 Eh | 5.2065e-19 kcal (IT) |
| 1000 Eh | 1.0413e-18 kcal (IT) |
Hartree Energy
The Hartree energy (Eh) is a unit of energy used in atomic physics, representing the total energy of an electron in a hydrogen atom in its ground state.
History/Origin
Named after the American physicist Douglas Hartree, the Hartree energy was introduced in the early 20th century as a fundamental atomic unit of energy within the system of atomic units, facilitating calculations in quantum mechanics.
Current Use
The Hartree energy is primarily used in theoretical and computational chemistry and physics to express energies at the atomic and molecular scale, especially in quantum chemistry calculations and atomic physics research.
Kilocalorie (It)
A kilocalorie (kcal) is a unit of energy equal to 1,000 calories, commonly used to measure the energy content of food and beverages.
History/Origin
The kilocalorie originated in the 19th century as a measure of heat energy, primarily used in nutrition and thermodynamics. It became standard in dietary contexts to quantify food energy intake.
Current Use
Today, the kilocalorie is widely used in nutrition to express the energy content of foods and beverages, and in scientific contexts related to energy measurement in biological and physical systems.
Frequently Asked Questions
What is 1 Hartree energy in kilocalorie (IT)?
1 Hartree energy (Eh) = 1.0413e-21 kilocalorie (IT) (kcal (IT)).
How do you convert Hartree energy to kilocalorie (IT)?
Multiply the Hartree energy value by 1.0413e-21. For example, 25 Eh × 1.0413e-21 = 2.6033e-20 kcal (IT).
What is 10 Hartree energy in kilocalorie (IT)?
10 Eh = 1.0413e-20 kcal (IT).
Which unit is larger, the Hartree energy or the kilocalorie (IT)?
The kilocalorie (IT) is the larger unit: 1 Eh equals only 1.0413e-21 kcal (IT).