xqomdi0n;2

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The following questions were asked by visitors named xqomdi0n;2.

Answers

The following answers were posted by visitors named xqomdi0n;2.

1) energy transfer by direct contact 2) the reactants and products in a reaction 3) surroundings 4) endothermic 5) It is an exothermic reaction. Fireworks are bright, indicating a release of energy