Commutator (electric) A commutator is a moving part of a rotary electrical switch in certain types of electric motors and electrical generators that periodically reverses the current direction between the rotor and the external circuit. It consists of a cylinder composed of multiple metal contact segments on the rotating armature of the machine.
The word equation that would represent the formation of lithium oxide from lithium metal and oxygen is: lithium + oxygen to lithium oxide. In chemical symbols, the balanced chemical equation is expressed as: Li + O2 = Li2O.
2[Li](s) + 2[H2O] â 2[LiOH](aq) + [H2](g) + energy. Itâs an exothermic reaction that transforms pure lithium in water to form good old hydrogen gas and Lithium hydroxide. Donât forget that because itâs exothermic, it releases energy, thus becoming like a flare.