Bond enthalpy

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Last updated 1:32 PM on 6/6/26
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5 Terms

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Bond enthalpy definition

energy needed to break 1 mol enthalpy of a specific bond in a molecule in gaseous state.

  • Must be a gas.

2
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Bond breaking

ENDOTHERMIC

have to put energy in to break bonds so reactants are positive as you are trying to break bonds

3
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Bond making

EXOTHERMIC

making bonds releases energy so products are negative.

4
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Bond enthalpy equation

sum of reactant enthalpies - sum of product enthalpies

5
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Why is it called “average” bond enthalpy?

As its an average due to the strength of bond being influenced by neighbouring bonds