Asked by Thelma

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

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

Answers

Answered by Neee
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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