Question

how do you know if a reaction uses energy

Answer 1

Answer:

This means that in the overall reaction, energy must be absorbed from the surroundings. This type of reaction is known as an endothermic reaction. An endothermic reaction is one that absorbs energy in the form of heat or light. Δ is read as delta and means a change in.

Answer 2

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how do you know if a reaction uses energ

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All chemical reactions involve energy. Energy is used to break bonds in reactants, and energy is released when new bonds form in products. Endothermic reactions absorb energy, and exothermic reactions release energy