This equation indicates that the reaction gives off heat. what is this type of reaction called? 2c4h10 +? o2 ? 8co2 + 10h2o + heat
a. an exothermic reaction
b. an endothermic reaction
c. absorption reaction
d. precipitation reaction

The answer to your question is letter a. exothermic reaction.

Explanation:

a. an exothermic reaction  An exothermic reaction is a reaction that gives off heat, so this option is correct.

b. an endothermic reaction An endothermic reaction is a reaction that absorbe energy from the surroundings so this option is wrong.

c. absorption reaction  It's a reaction similar to an endothermic reaction so is not the right answer

d. precipitation reaction It's another kind of reaction where one of the products precipitate, this option is incorrect.

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