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# Physical Constants

These values are the same as those in the Cantera C++ header file ct_defs.h.

cantera.avogadro

  Avogadro’s Number, kmol-1

cantera.gas_constant

  The ideal gas constant, J kmol-1 K-1

cantera.one_atm

  One atmosphere, Pa

cantera.boltzmann

  Boltzmann constant, m2 kg s-2 K-1

cantera.planck

  Planck constant, J s

cantera.stefan_boltzmann

  The Stefan-Boltzmann constant, W m-2 K-4

cantera.electron_charge

  The charge on an electron, C

cantera.electron_mass

  The mass of an electron, kg

cantera.faraday

  Faraday constant, C kmol-1

cantera.light_speed

  Speed of Light, m s-1

cantera.permeability_0

  Permeability of free space, m kg s-2 A-2

cantera.epsilon_0

  Permittivity of free space, s4 A2 m-3 kg-1