Convert kilocalorie (th) to Hartree energy
Please provide values below to convert kilocalorie (th) [kcal (th)] to Hartree energy [Eh], or Convert Hartree energy to kilocalorie (th).
1 kcal (th) = 9.5969e+20 Eh. To convert kilocalorie (th) to Hartree energy, multiply the value by 9.5969e+20; to go the other way, divide by it (1 Eh = 1.0420e-21 kcal (th)). Both units measure energy and appear in everyday as well as technical calculations, so switching between them quickly is often useful.
Quick Reference
- 1 kcal (th) = 9.5969e+20 Eh
- 1 Eh = 1.0420e-21 kcal (th)
- 10 kcal (th) = 9.5969e+21 Eh
- 100 kcal (th) = 9.5969e+22 Eh
How to Convert Kilocalorie (Th) to Hartree Energy
1 kcal (th) = 9.59688451732144e+20 Eh
Example: convert 15 kcal (th) to Eh:
15 kcal (th) = 15 × 9.59688451732144e+20 Eh = 1.43953267759822e+22 Eh
Kilocalorie (Th) to Hartree Energy Conversion Table
| kilocalorie (th) | Hartree energy |
|---|---|
| 1 kcal (th) | 9.5969e+20 Eh |
| 2 kcal (th) | 1.9194e+21 Eh |
| 3 kcal (th) | 2.8791e+21 Eh |
| 5 kcal (th) | 4.7984e+21 Eh |
| 10 kcal (th) | 9.5969e+21 Eh |
| 20 kcal (th) | 1.9194e+22 Eh |
| 50 kcal (th) | 4.7984e+22 Eh |
| 100 kcal (th) | 9.5969e+22 Eh |
| 500 kcal (th) | 4.7984e+23 Eh |
| 1000 kcal (th) | 9.5969e+23 Eh |
Kilocalorie (Th)
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 unit to quantify heat energy, especially in nutrition and thermodynamics. It was widely adopted in the early 20th century for dietary energy measurement.
Current Use
Today, the kilocalorie is primarily used in nutrition to express the energy content of food and drinks, although it is often simply called a 'calorie' in everyday language.
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.
Frequently Asked Questions
What is 1 kilocalorie (th) in Hartree energy?
1 kilocalorie (th) (kcal (th)) = 9.5969e+20 Hartree energy (Eh).
How do you convert kilocalorie (th) to Hartree energy?
Multiply the kilocalorie (th) value by 9.5969e+20. For example, 25 kcal (th) × 9.5969e+20 = 2.3992e+22 Eh.
What is 10 kilocalorie (th) in Hartree energy?
10 kcal (th) = 9.5969e+21 Eh.
Which unit is larger, the kilocalorie (th) or the Hartree energy?
The kilocalorie (th) is the larger unit: 1 kcal (th) = 9.5969e+20 Eh.