Chemistry

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The energy necessary to start a chemical reaction is called the _______ energy.

a)exothermic
b)activation
c)endothermic
d)combustion

  • Chemistry -

    Activation

    The name gives the clue. Activate - make (something) active or operative.


    Also exothermic means heat releasing
    so endothermic means heat absorbing
    combustion is burning with oxygen

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