The reaction of copper(II) nitrate with heat is a decomposition reaction that results in the formation of copper(II) oxide, nitrogen dioxide, and oxygen gas.

Here's the balanced molecular equation:

2 Cu(NO₃)₂ (s) → 2 CuO (s) + 4 NO₂ (g) + O₂ (g)

Explanation:

* Cu(NO₃)₂ (s) represents copper(II) nitrate in its solid state.

* CuO (s) represents copper(II) oxide in its solid state.

* NO₂ (g) represents nitrogen dioxide in its gaseous state.

* O₂ (g) represents oxygen gas in its gaseous state.

Important notes:

* This reaction is highly exothermic, meaning it releases a significant amount of heat.

* Nitrogen dioxide is a toxic reddish-brown gas.

* The reaction is typically carried out in a fume hood due to the release of toxic gases.

Let me know if you have any other questions.