Convert calorie (nutritional) to Hartree energy
Please provide values below to convert calorie (nutritional) [Cal] to Hartree energy [Eh], or Convert Hartree energy to calorie (nutritional).
How to Convert Calorie (Nutritional) to Hartree Energy
1 Cal = 9.60330690657777e+20 Eh
Example: convert 15 Cal to Eh:
15 Cal = 15 × 9.60330690657777e+20 Eh = 1.44049603598667e+22 Eh
Calorie (Nutritional) to Hartree Energy Conversion Table
| calorie (nutritional) | Hartree energy |
|---|
Calorie (Nutritional)
A calorie (Cal) is a unit of energy used to measure the amount of energy provided by food and beverages, specifically representing the amount of energy needed to raise the temperature of one kilogram of water by one degree Celsius.
History/Origin
The calorie was first introduced in the 19th century as a unit to quantify energy in nutrition. It has since become a standard measure in dietary and nutritional contexts, although the scientific community often prefers the joule as the SI unit of energy.
Current Use
Calories are widely used in nutrition to quantify the energy content of food and beverages, helping consumers manage dietary intake and energy balance. The term 'Calorie' with a capital 'C' typically refers to kilocalories (kcal), which are equivalent to 1,000 small calories.
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.