Convert calorie (IT) to Hartree energy
Please provide values below to convert calorie (IT) [cal (IT)] to Hartree energy [Eh], or Convert Hartree energy to calorie (IT).
How to Convert Calorie (It) to Hartree Energy
1 cal (IT) = 9.60330690657777e+17 Eh
Example: convert 15 cal (IT) to Eh:
15 cal (IT) = 15 × 9.60330690657777e+17 Eh = 1.44049603598667e+19 Eh
Calorie (It) to Hartree Energy Conversion Table
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Calorie (It)
The calorie (cal) is a unit of energy traditionally used to quantify the amount of heat required to raise the temperature of one gram of water by one degree Celsius at standard atmospheric pressure.
History/Origin
The calorie was originally defined in the 19th century as a unit of heat energy in thermodynamics. It has historically been used in nutrition and physics, but has largely been replaced by the joule in scientific contexts. The 'small calorie' (cal) is distinct from the 'large calorie' (kcal), which is commonly used in food energy labeling.
Current Use
Today, the calorie is primarily used in nutrition to measure the energy content of foods and beverages, although the SI unit of energy, the joule, is increasingly preferred in scientific and technical fields.
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.