[Input] Document handling of activation energy in eV

doc/sphinx/yaml/general.rst

@@ -62,8 +62,8 @@ Supported base units are:
 Supported compound units are:
 
 - Energy: ``J``, ``cal``, ``erg``, ``eV``
-- Activation Energy: ``K``, or any unit of energy per quantity (``J/kmol``,
-  ``cal/mol``, etc.)
+- Activation Energy: ``K``, any unit of energy per quantity (``J/kmol``,
+  ``cal/mol``, etc.), or any unit of energy (such as `eV`)
 - Force: ``N``, ``dyn``
 - Pressure: ``Pa``, ``atm``, ``bar``, ``dyn/cm^2``
 - Volume: ``m^3``, ``liter``, ``L``, ``l``, ``cc``
@@ -91,7 +91,9 @@ explicitly in the units that a value is being converted to within Cantera. For
 example, a conversion to ``N/m^2`` will use the default units for mass, length,
 and time, while a conversion to ``Pa`` will use the default units for pressure.
 
-Conversions of activation energies implicitly include scaling by the gas
-constant where necessary. Setting default units for ``energy`` and ``quantity``
-will determine the default units of ``activation-energy``, which can be
-overridden by explicitly giving the desired units of ``activation-energy``.
+Activation energies given in temperature units will be implicit converted to energy per
+quantity by dividing by the gas constant. Activation energies given in pure energy units
+such as eV will be converted to energy per quantity by multiplying by the Avogadro
+constant. Setting default units for ``energy`` and ``quantity`` will determine the
+default units of ``activation-energy``, which can be overridden by explicitly giving
+the desired units of ``activation-energy``.