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Why is ethanoate acids dissociation endothermic? OCR Question

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    The question compares the enthrall change of ethanoate acid and hydrochloride acid.
    The MS States:
    Ethanoate acid is a weak acid that partially dissociates
    It's dissociation is endothermic
    Therefore lowering the heat given out by the reaction

    Can anyone explain why it's dissociation in endothermic pls??

    Bond dissociation is endothermic always. Bond formation is exothermic always.

    HCL is a strong acid so it would fully dissociate. This is also an endothermic reaction. Similarly when bonds are broken producing H+ ions in the case of ethanoic acids partial dissociation we have an endothermic reaction.
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