Create molecular_chemistry.py

Author: FirePing32

conversions/molecular_chemistry.py

@@ -0,0 +1,76 @@
+def molarity_to_normality(nfactor: int, moles: float, volume: float) -> float:
+  """
+  Convert molarity to normality.
+    Volume is taken in litres.
+
+    Wikipedia reference: https://en.wikipedia.org/wiki/Equivalent_concentration
+    Wikipedia reference: https://en.wikipedia.org/wiki/Molar_concentration
+
+    >>> molarity_to_normality(2, 3.1, 0.31)
+    20.0
+    >>> molarity_to_normality(4, 11.4, 5.7)
+    8.0
+
+  """
+  return (float(moles/volume) * nfactor)
+
+def moles_to_pressure(volume: float, moles: float, temperature: float) -> float:
+  """
+  Convert moles to pressure.
+    Ideal gas laws are used.
+    Temperature is taken in kelvin.
+    Volume is taken in litres.
+    Pressure has atm as SI unit.
+
+    Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws
+
+    >>> moles_to_pressure(0.82, 3, 300)
+    90
+    >>> moles_to_pressure(8.2, 5, 200)
+    10
+
+  """
+  return float((moles * 0.0821 * temperature)/(volume))
+
+def moles_to_volume(pressure: float, moles: float, temperature: float) -> float:
+  """
+  Convert moles to volume.
+    Ideal gas laws are used.
+    Temperature is taken in kelvin.
+    Volume is taken in litres.
+    Pressure has atm as SI unit.
+
+    Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws
+
+    >>> moles_to_volume(0.82, 3, 300)
+    90
+    >>> moles_to_volume(8.2, 5, 200)
+    10
+
+  """
+  return float((moles * 0.0821 * temperature)/(pressure))
+
+def pressure_and_volume_to_temperature(pressure: float, moles: float, volume: float) -> float:
+  """
+  Convert pressure and volume to temperature.
+    Ideal gas laws are used.
+    Temperature is taken in kelvin.
+    Volume is taken in litres.
+    Pressure has atm as SI unit.
+
+    Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws
+
+    >>> pressure_and_volume_to_temperature(0.82, 1, 2)
+    20
+    >>> pressure_and_volume_to_temperature(8.2, 5, 3)
+    60
+
+  """
+  return float((pressure * volume)/(0.0821 * moles))
+
+
+if __name__ == "__main__":
+
+  import doctest
+  doctest.testmod()
+