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24 June, 05:34

A calorimeter contains 251 g of water at 24.3 C. The temperature of the water decreases to 18.5 C when 12.5 g of potassium nitrate is dissolved in water. Is dissolving potassium nitrate in water endothermic or exothermic

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  1. 24 June, 09:33
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    Endothermic

    Explanation:

    The temperature of the water decreased.

    The water lost heat.

    The heat must have gone into getting the KNO₃ into solution.

    So, the dissolving of KNO₃ in water is endothermic.
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