Conversion between Energy Units - Maple Help

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Conversion between Energy Units

 

Description

Examples

References

Description

• 

In certain fields, for example, chemistry and physics, it is often useful to convert between various energy units.  Common examples are the conversions among frequency (MHz), wavenumber (1/cm), energy (hartrees), molar energy (kJ/mol), and temperature (kelvin).

• 

Energy conversions are performed by using the 'energy'=true option with the functions convert/units and convert/dimensions.

• 

Energy conversions may be seen as applying the following transformations on the dimensions of the units:

1 second =

c meters

1 kilogram =

c/h per meter

1 kelvin =

k/(h*c) per meter

1 ampere =

1/sqrt(1e7*c*h) per meter

1 candela =

1/(683*c^2*h) per square meter steradian

  

where c is the absolute value of the speed of light in meters per second, by definition 299792458, h is the absolute value of the Planck constant in joule seconds, approximately 6.626075510-34, and k is the absolute value of the Boltzmann constant in joules per kelvin, approximately 1.38065810-23.

Examples

Convert the wavenumber to frequency, energy, molar energy, and temperature.

convert1'centimeter','dimensions','energy'=true

1length

(1)

convert83.59347279,'units',1'centimeter','megahertz','energy'=true

2.506069268106

(2)

convert83.59347279,'units',1'centimeter','attojoules','energy'=true

0.001660538728

(3)

convert83.59347279,'units',1'centimeter','kilojoules''mole','energy'=true

0.9999999998

(4)

convert83.59347279,'units',1'centimeter','kelvin','energy'=true

120.2722193

(5)

Convert the SI unit coulombs to its associated units in the CGS electromagnetic (EMU) and electrostatic (ESU) systems.

convert'C','dimensions','energy'=true

1

(6)

convert1.602191710-19,'units','C','centimeters''gram','energy'=true

1.60219170010-20

(7)

convert1.602191710-19,'units','C','centimeters'32'gram'12'second','energy'=true

4.80324987910-10

(8)

Convert the speed of light into units of action (1 planck = 1 joule second).

convert'm''s','dimensions','energy'=true

1

(9)

convert2.99792458108,'units','m''s','planck','energy'=true

6.62606876110-34

(10)

Additional examples:

convert'W','dimensions','energy'=true

1length2

(11)

convert299.7924580,'units','newtons','watts','energy'=true

8.9875517871010

(12)

convert299.7924580,'units','joule','watts','energy'=true

1.1646427671019

(13)

References

  

Lide, David, R., ed. Handbook of Chemistry and Physics. CRC Press, 1996.

See Also

convert/dimensions

convert/units

Units

Units/Details

Units/Index

 


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