chemical energetics

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5 Terms

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endothermic

absorb thermal energy from surrounding → decrease in temp of surroundings

  • bonds broken

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exothermic reaction

release thermal energy to surroundings → increase in temp of surroundings

  • bonds formed

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examples of endothermic reaction

decomposition, electrolysis of h2o, boiling, melting, sublimation

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examples of exothermic reaction

neutralisation, combustion, freezing, condensation

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activation energy

minimum energy required to be possessed by reactant particles before products can be formed