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Energy Changes

Section D3.3. Energy Changes. Bond Energy. Energy associated with bonds Exothermic reactions: Energy is released Produces an increase in temperature May produce light Reactants  Products and Energy. Endothermic Reaction. A reaction in which energy is absorbed

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Energy Changes

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  1. Section D3.3 Energy Changes

  2. Bond Energy • Energy associated with bonds • Exothermic reactions: • Energy is released • Produces an increase in temperature • May produce light • Reactants  Products and Energy

  3. Endothermic Reaction • A reaction in which energy is absorbed • Produces a decrease in temperature • Reactants + Energy  Products • Photosynthesis: Endothermic reactions

  4. Respiration • Obtain energy from glucose molecules combusting • Produces CO2 and H2O • Opposite of photosynthesis

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