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14 February, 00:46

Copper is added to a solution of nitric acid. The solution becomes hot and changes from colorless to dark blue. What is the best explanation for the change in temperature?

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  1. 14 February, 01:51
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    When copper is added to a solution of nitric acid, their chemical reaction produces heat.

    Explanation:

    During the reaction between copper an d nitric acid, the copper metal is oxidised to form copper (ii) ion, by nitrate ion. Then this is converted into notrogen oxide gas. As, a result of this conversion, there is a binding of copper (ii) ion with water molecules of number 6. As a result of this, the copper metal will turn into a solution which is blue and a gas of brown color is obtained.

    Thus when copper is added to nitric aci, there is a change in the temperature. The chemical reaction that takes place between Copper and Nitric acid solution generates heat. This process is an exotermic.
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