Enthalpy definitions

One mole of gaseous atoms is converted from the element in its standard state under standard conditions

loss of one mole of electrons from gaseous atoms to form one mole of gaseous ions each with a single positive charge

One mole of ionic compound dissociates into its gaseous ions

One mole of ionic compound is formed from its constituent elements under standard conditions

One mole of gaseous ions is converted into one mole of aqueous ions

One mole of substance is completely burnt in oxygen

One mole of ionic compound is formed from its gaseous ions

one mole of ionic molecule each break a covalent bond forming two free radicals, averaged over a range of compounds.

One mole of electrons are added to one mole of gaseous atoms forming one mole of gaseous ions each with a single negative charge

One mole of electrons is added to one mole of negatively charged gaseous ions each with a single negative charge forming a mole of gaseous ions each with a two negative charge

One mole of electrons is lost from one mole of gaseous ions each with a single positive charge to form one mole of gaseous ions each with a two positive charge

One mole of ionic compound is completely dissolved in water to form its aqueous ions