Answer 1:
The common glow sticks use a substance that
emits light when it is oxidized by oxygen. The
substance is called
luminol[(3-aminophthalhydrazide
C8H7O2N3)] and
the oxidant normally used is hydrogen
peroxide. In the course of a chemical
reaction, there are always significant changes in
the energy content of the reactants as they
transform into products. This energy must be
absorbed from or dispersed to the surroundings of
the system. (Remember the First Law of
Thermodynamics, no energy is either created or
destroyed). The energy stored in the reactants
sometimes is liberated as heat (exothermic
reactions) and sometimes also as other forms of
energy, in the case of the glowing stick reaction,
as light. The process is called
chemiluminescence. Please read more answers
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