Convert Hartree energy to calorie (th)
Please provide values below to convert Hartree energy [Eh] to calorie (th) [cal (th)], or Convert calorie (th) to Hartree energy.
How to Convert Hartree Energy to Calorie (Th)
1 Eh = 1.04200482791587e-18 cal (th)
Example: convert 15 Eh to cal (th):
15 Eh = 15 × 1.04200482791587e-18 cal (th) = 1.5630072418738e-17 cal (th)
Hartree Energy to Calorie (Th) Conversion Table
| Hartree energy | calorie (th) |
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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.
Calorie (Th)
The calorie (th) is a unit of energy used to quantify the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius.
History/Origin
The calorie (th) was historically used in the context of thermochemistry and nutrition, originating from the calorie concept in the 19th century. It has largely been replaced by the joule in scientific contexts but remains in common use in some regions and fields.
Current Use
Today, the calorie (th) is primarily used in nutrition labeling and food energy measurements, especially in regions where the thermochemical calorie is still recognized, although the joule is the SI standard.