Many spontaneously occurring chemical reactions liberate electrical energy, and some of these reactions are used in batteries and fuel cells to produce electric power.
(Many; spontaneously occurring; ) (chemical reactions; liberate; electrical energy) (some of these reactions; are used; L:in batteries and fuel cells; to produce electric power)
Many chemical reactions some of these reactions
spontaneously occurring liberate are used
electrical energy
L:in batteries and fuel cells to produce electric power