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One mole of particles given 1 eV of energy each has approximately 96.5 kJ of energy – this corresponds to the Faraday constant (F ≈ 96 485 C⋅mol −1), where the energy in joules of n moles of particles each with energy E eV is equal to E·F·n.
The first molar ionization energy applies to the neutral atoms. The second, third, etc., molar ionization energy applies to the further removal of an electron from a singly, doubly, etc., charged ion. For ionization energies measured in the unit eV, see Ionization energies of the elements (data page). All data from rutherfordium onwards is ...
Other units sometimes used to describe reaction energetics are kilocalories per mole (kcal·mol −1), electron volts per particle (eV), and wavenumbers in inverse centimeters (cm −1). 1 kJ·mol −1 is approximately equal to 1.04 × 10 −2 eV per particle, 0.239 kcal·mol −1, or 83.6 cm −1.
The "kT" constant at 25 °C, a common rough approximation for the total thermal energy of each molecule in a system (0.03 eV) [13] 7–22×10 −21 J Energy of a hydrogen bond (0.04 to 0.13 eV) [11] [14] 10 −20 4.5×10 −20 J Upper bound of the mass–energy of a neutrino in particle physics (0.28 eV) [15] [16] 10 −19 1.602 176 634 × 10 ...
Photon energy is often measured in electronvolts. One electronvolt (eV) is exactly 1.602 176 634 × 10 −19 J [3] or, using the atto prefix, 0.160 217 6634 aJ, in the SI system. To find the photon energy in electronvolt using the wavelength in micrometres, the equation is approximately
In SI units, one kilocalorie per mole is equal to 4.184 kilojoules per mole (kJ/mol), which comes to approximately 6.9477 × 10 −21 joules per molecule, or about 0.043 eV per molecule. At room temperature (25 °C, 77 °F, or 298.15 K), one kilocalorie per mole is approximately equal to 1.688 kT per molecule.
In physics and chemistry, it is common to measure energy on the atomic scale in the non-SI, but convenient, units electronvolts (eV). 1 eV is equivalent to the kinetic energy acquired by an electron in passing through a potential difference of 1 volt in a vacuum. It is common to use the SI magnitude prefixes (e.g. milli-, mega- etc) with ...
In physical chemistry, the Faraday constant (symbol F, sometimes stylized as ℱ) is a physical constant defined as the quotient of the total electric charge (q) by the amount (n) of elementary charge carriers in any given sample of matter: F = q/n; it is expressed in units of coulombs per mole (C/mol).