Chemistry

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Hi,
I am stuck on this question and would appreciate some guidance. The question states " The value of Kw decreases as the temperature decreases. Is the auto-ionization of water an exothermic or endothermic reaction in the forward direction?"
I feel like the answer should be exothermic as I know from studying Le Chatelier's principle that a decrease in temperature favours the reaction to occur in the forward direction. Is that a correct assumption?

  • Chemistry -

    ionization decreases as temp decreases so..
    ionization increases as temp increases
    water+heat>>ions

    endothermic

  • Chemistry -

    ionization decreases as temp decreases so..
    ionization increases as temp increases
    water+heat>>ions

    endothermic, so decrease in temp favors reverse.

    check my logic

  • Chemistry -

    when temp decreases, water will decrease in solubility or in ionization and the reaction will favour the backward reaction;

    H+ + OH- --> H2O

    so we know that the backward reaction is endothermic and the forward is exothermic.

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