Question

In a chemical reaction, the reactants are substances that undergo the reaction, and the products are substances that are formed during the reaction. The table below shows the reactants and products of several different chemical reactions.

Reactants Products Type of Reaction
4K + O2 2K2O + heat Exothermic
2H2O + heat 2H2 + O2 Endothermic
2CO + O2 2CO2 + heat Exothermic
CaCO3 + heat CaO + CO2 Endothermic

Based on the information given in the above table, the best definition of an endothermic reaction would be

Answer 1

a a reaction that does not require heat.
b a reaction that absorbs heat.
c a reaction that releases heat.
d a reaction that has one product.

Answer 2

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Answer 3

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Answer 4

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Answer 5

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Answer 6

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Answer 7

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Answer 8

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Answer 9

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Answer 10

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Answer 11

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Answer 12

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Answer 13

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Answer 14

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Answer 15

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Answer 16

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Answer 17

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Answer 18

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Answer 19

B

Answer 20

My guess go with what you think

Answer 21

your rright thanks

Answer 22

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