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Why do we have to calculate bond enthalpies of substances in a GAS STATE? Watch

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    As the title says, why do substances have to be a GAS state in order to do bond enthalpies?

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    Is that a question in a paper or are you asking for the same of it? I really don't know thats just how it is. Bond Enthalpy in its definition is about measuring in its gaseous state though

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    There are strong intermolecular forces in liquids and solids which I imagine would affect enthalpy calculations as they require energy to break.
 
 
 
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