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level: 6.5 Bond energies and enthalpy changes

Questions and Answers List

level questions: 6.5 Bond energies and enthalpy changes

QuestionAnswer
Bond breaking is (endo/exo) thermicendothermic
Bond making is (endo/exo) thermicexothermic
Bond energy requires energy, why?Energy is needed to overcome the attractive forces joining the atoms together
In a chemical reaction if the energy needed to break bonds is less than the energy released when new bonds are formed. What happensThe reaction will release energy and is exothermic
In a chemical reaction if the energy needed to break bonds is more than energy released when new bonds are formed. What happens?The reaction will absorb energy and is exothermic
What is dissociation energy and exact bond energy?amount of energy needed to break a specific covalent bond
What is the symbol for bond energyE
Bond energy is affected by whatBond energy is affected by other atoms in the molecule