chemyst 2.2.1

Useful functions to work with basic chemistry and stochiemetry

The Chemyst library

To install chemyst run pip install chemyst

Usage For P_total

# PVnRT stands for Pressure, Volume, Number of Moles, R is the ideal gas law constant, T is temperature
from chemyst.PVnRT import P_total
# Mixture of 3 gases lets say
total_pressure = P_total([9.987, 2.33, 123.9])
print(total_pressure)
# OUTPUT: 136.217

Args:

• pressure is the only argument to P_total
  • It is a list of the partial pressure of all the gases in a mixture

Usage For partial_pressure

from chemyst.PVnRT import partial_pressure
# Args: num_moles, ideal_gas_law, temp, volume, is_temp_kelvin=True
pressureO2 = partial_pressure(2, 'atm', 31, 15.0, False)
print(pressureO2)
# OUTPUT: 13.2

Args:

• num_of_moles is the number of moles of the given gas
• ideal_gas_law is the ideal gas law constant to use for the given pressure unit
  • if the pressure unit is atm
    • ideal_gas_law should be 'atm'
  • if the pressure unit is kpa
    • ideal_gas_law should be 'kpa'
  • if the pressure unit is mmHg
    • ideal_gas_law should be 'mmhg'
• temp is the given temperature can be either Celsius or Kelvin
• volume is the volume of the container
• is_temp_kelvin determines whether the temperature should be converter to Kelvin or not
  • if the temperature is in celsius is_temp_kelvin should equal false

Usage For the moles_mass module

from chemyst.moles_mass import moles_to_mass, mass_to_moles, atoms_to_grams, grams_to_atoms
# Moles to mass OUTPUT: 512g
moles_to_mass(16, 32)
# Mass to moles OUTPUT: 16.0
mass_to_moles(512, 32)
# Atoms to grams OUTPUT: 7.18e20
atoms_to_grams(1352, 32)
# Grams to atoms OUTPUT: 1.88e24 
grams_to_atoms(100, 32)

Args:

• moles_to_mass(num_moles, molar_mass)
  • num_moles is the number of moles to be converted to grams
  • molar_mass is the mass of the element in grams
    • for example O2 would have a molar mass of 32
• mass_to_moles(g_of_element, molar_mass)
  • g_of_element is the amount of grams which will be converted to moles
  • molar_mass is the mass of the element in grams
• atoms_to_grams(num_atoms, molar_mass)
  • num_atoms is the number of atoms to be converted to grams
  • molar_mass is the mass of the element in grams
• grams_to_atoms(g_of_element, molar_mass)
  • g_of_element is the amount of grams which will be converted to moles
  • molar_mass is the mass of the element in grams

Usage For the yields module

Theoretical yield

The yields module is slightly different than the others

the theoretical_yield() function takes 3 arguments:

• actual_yield
  • the yield given in the equation
• mole_ratio_top which is
  • From the balanced equation given, the number of moles of the wanted element
• mole_ratio_bottom which likewise is
  • From the balanced equation given, the number of moles of the given element

IMPORTANT: the theoretical_yield() function arguments MUST all be moles
this can be easily achieved by using the moles_to_mass and mass_to_moles functions of chemyst.moles_mass

Percent Yield

the percent yield() function take 2 arguments

• actual_yield
  • yield given in the equation
• theoretical_yield
  • this yield can be calculated using the theoretical_yield() function

IMPORTANT: the percent_yield() function arguments MUST all be grams
this can be easily achieved by using the moles_to_mass and mass_to_moles functions of chemyst.moles_mass