Reaction equilibrium constant via standard Gibbs energy
=======================================================

The equilibrium constant is a value that determines for a given chemical reaction the ratio between
thermodynamic activities (or, depending on the conditions of the reaction, partial pressures,
concentrations or fugitives) of reactants and products in a state of chemical equilibrium.

**Notation:**

#. :math:`R` (:code:`R`) is :attr:`~symplyphysics.quantities.molar_gas_constant`.

**Conditions:**

#. The term "standard" applies to a solution of an infinite dilution and of a hypothetical standard
   concentration, typically :math:`1 \text{mol}/\text{kg}`.

**Links:**

#. `Wikipedia, derivable from the fifth equation <https://en.wikipedia.org/wiki/Equilibrium_constant#Basic_definitions_and_properties>`__.

.. py:currentmodule:: symplyphysics.laws.chemistry.reaction_equilibrium_constant_via_standard_gibbs_energy

.. py:data:: equilibrium_constant

    Equilibrium constant of the reaction.

Symbol:
    :code:`K`

Latex:
    :math:`K`

Dimension:
    :code:`dimensionless`


.. py:data:: reaction_standard_gibbs_energy

    Reaction standard :attr:`~symplyphysics.symbols.thermodynamics.gibbs_energy`, which is the sum of the standard Gibbs
    energies of the reaction products minus that of reactants.

Symbol:
    :code:`Delta(G)`

Latex:
    :math:`\Delta G`

Dimension:
    :code:`energy/amount_of_substance`


.. py:data:: temperature

    :attr:`~symplyphysics.symbols.thermodynamics.temperature` of the system.

Symbol:
    :code:`T`

Latex:
    :math:`T`

Dimension:
    :code:`temperature`


.. py:data:: law

    :code:`K = exp(-Delta(G) / (R * T))`


    Latex:
        .. math::
            K = \exp{\left(- \frac{\Delta G}{R T} \right)}