Question

What happens when copper nitrate undergoes heating?

Answer 1

$Cu{(N{O_3})_2}$ or copper (II) nitrate, is an inorganic chemical that crystallises as a blue crystalline solid. Anhydrous copper nitrate crystallises into vivid blue-green crystals and sublimes at $150 - {200^ \circ }C$ in a vacuum. Copper nitrate comes in five distinct hydrates, with the hemi pentahydrate and trihydrate being the most frequent.

Complete answer:
When copper nitrate undergoes heating, a metal oxide, nitrite and oxygen are produced. Hence, the products formed are copper oxide, nitrogen dioxide and oxygen.
The reaction that takes place is as follows:
$2Cu{(N{O_3})_2}\; \to {\text{ }}2CuO{\text{ }} + {\text{ }}4N{O_2}\; + {\text{ }}{O_2}$.
Copper nitrate on heating decomposes to give reddish brown gas nitrogen dioxide and oxygen. The greenish blue crystals of copper nitrate will change to black residue of copper oxide
These products are formed due to thermal decomposition of potassium nitrate.

Additional Information: A decomposition reaction that is activated by thermal energy is known as a thermal decomposition reaction. To put it another way, a thermal decomposition reaction necessitates the delivery of energy to the reactants in the form of heat. Because energy is required to break chemical bonds and separate the constituent elements, such reactions are usually endothermic.
Applications of Decomposition reactions:
Cement or calcium oxide production.
Extraction of metals from oxides, chlorides, and other metallurgical processes.
Acid indigestion is relieved.
Welding with thermite.

Note:
Decomposition reactions are not all endothermic. Endothermic and exothermic breakdown reactions are both possible. A combination reaction is the polar opposite of a decomposition process. The creation of a single product from two or more reactants is the goal of these reactions.