constants: Constants

In npetraco/che302r: Handy functions for CHEM 302, Physical Chemistry II

Constants

Description

Constants available

Usage

Constants:
h      Planck's const, Js
cl     Speed of light, m/s
kB     Boltzmann's const, J/K
hb     Reduced Planck's const, Js
N.A    Avogadro's number, particles
me     mass of electron, kg
mP     mass of proton, kg
mN     mass of neutron, kg
ec     charge of electron, Coulombs
RH     Rydberg constant, wavenumbers cm^-1
RHJ    Rydberg constant, Joules
alphaf Fine structure constant, dimensionless
eps0   Vacuum permittivity, Farads/m
a0     Bohr radius, m

Handy Conversions:
eV2J         electron-volt to Joules, energy gained by 1 e- accelerated though 1V
J2eV         Joules to eV
hartree2J    hartrees to Joules
amu2kg       amu to kg
bohr2m       bohr to meters
auf2Hz       atomic units frequency to Hz, Unit= s^-1
lambdaFw2icm atomic units mass weighted Fw eigenvalues to nu-tilde = omega/(2*pi*c), Unit = cm^-1
lambdaF2icm  Conversion factor from sqrt(hartree/amu-bohr^2) to cm^-1

Details

These physical constants and handy conversions are available in the che302r library. Reference for these and more cf. https://www.nist.gov/pml/fundamental-physical-constants

npetraco/che302r documentation built on April 17, 2025, 10:34 p.m.