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Joule per mole

 

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Joule per mole



 
 
The joule per mole (symbol: J/mol, J·mol-1) is an SI
Si

Si, si, or SI may refer to :...
 derived unit of energy per amount of material. Energy is measured in joule
Joule

The joule is the SI derived unit of energy in the International System of Units. It is defined as:One joule is the amount of energy required to perform the following actions:...
s, and the amount of material is measured in moles
Mole (unit)

The mole is a Units of measurement of amount of substance: it is an SI base unit, and one of the few units used to measure this physical quantity....
.

Physical quantities measured in J·mol-1 are usually free energies
Thermodynamic free energy

In thermodynamics, the term thermodynamic free energy refers to the amount of Work that can be extracted from a system, and is helpful in engineering applications....
, such as:

For convenience and due to the range of magnitudes involved, these quantities are nearly always quoted in kJ/mol. For example, heats of fusion and vaporization are usually of the order of 10 kJ/mol, bond energies are of the order of 100 kJ/mol, and ionization energies of the order of 1000 kJ/mol.

1 kJ/mol is equal to 0.239 kcal/mol
Kilocalorie per mole

Kilocalorie per mole is the quotient of a kilocalorie and a mole , mainly used in the United States. It is a derived unit of energy per Avogadro's number of particles, where energy is measured in units of 1000 small calories....
.






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The joule per mole (symbol: J/mol, J·mol-1) is an SI
Si

Si, si, or SI may refer to :...
 derived unit of energy per amount of material. Energy is measured in joule
Joule

The joule is the SI derived unit of energy in the International System of Units. It is defined as:One joule is the amount of energy required to perform the following actions:...
s, and the amount of material is measured in moles
Mole (unit)

The mole is a Units of measurement of amount of substance: it is an SI base unit, and one of the few units used to measure this physical quantity....
.

Physical quantities measured in J·mol-1 are usually free energies
Thermodynamic free energy

In thermodynamics, the term thermodynamic free energy refers to the amount of Work that can be extracted from a system, and is helpful in engineering applications....
, such as:
  • Heat of vaporization
  • Heat of fusion
  • Ionization energy


For convenience and due to the range of magnitudes involved, these quantities are nearly always quoted in kJ/mol. For example, heats of fusion and vaporization are usually of the order of 10 kJ/mol, bond energies are of the order of 100 kJ/mol, and ionization energies of the order of 1000 kJ/mol.

1 kJ/mol is equal to 0.239 kcal/mol
Kilocalorie per mole

Kilocalorie per mole is the quotient of a kilocalorie and a mole , mainly used in the United States. It is a derived unit of energy per Avogadro's number of particles, where energy is measured in units of 1000 small calories....
. At room temperature (25 °C
Celsius

Celsius is a temperature scale that is named after the Swedish astronomer Anders Celsius , who developed a similar temperature scale two years before his death....
, 77 °F
Fahrenheit

Fahrenheit is a temperature scale named after the physicist Daniel Gabriel Fahrenheit , who proposed it in 1724. Today, the scale has largely been replaced by the Celsius scale; it is still in use for non-scientific purposes in the United States and a few other countries such as Belize....
, or 298.15 K
Kelvin

The kelvin is a Units of measurement of temperature and is one of the seven SI base units. The Kelvin scale is a Thermodynamic temperature scale where absolute zero, the theoretical absence of all thermal energy, is zero ....
) 1 kJ/mol is equal to 0.4034
KT (energy)

'kT' is the product of the Boltzmann constant, k, and the temperature, T. This product is used in physics as a scaling factor for energy values in molecule-scale systems , as the rates and frequencies of many processes and phenomena depend not on their energy alone, but on the ratio of that energy and kT, that is, on E / k...
.

One can convert to electronvolt
Electronvolt

In physics, the electron volt is a unit of energy. By definition, it is equal to the amount of kinetic energy gained by a single unbound electron when it accelerates through an Electrostatics potential difference of one volt....
s using the fact that

1 eV = e J/C = (96485.38 ± 0.02) NA-1 J/mol.