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Question 5 of 10 What is an exothermic reaction? A. A reaction that describes the forming of bonds OB. A reaction that is cold O C. A reaction that requires heat DO D. A reaction that takes in energy from outside itself SUBMIT​

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Answer: A. (A reaction that describes the forming of bonds.)

Explanation: It isn’t C because a reaction that requires heat in order to occur is called an endothermic reaction. For letter D, In an endothermic reaction or system, energy is taken from the surroundings in the course of the reaction, usually driven by a favorable entropy increase in the system. I also don’t think B is the correct answer because endothermic reactions require heat, which means that they are cold.

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