Question

(b) Decomposition reactions can occur by (i) heat
Give two balanced equations for each

Answer 1

During a thermal decomposition reaction, a single substance breaks into two or more simple substances when heated. Examples
1. When copper carbonate is heated, it decomposes to form copper oxide and carbon dioxide. The balanced equation for the reaction is,
$CuC{O}_3\left(s\right)$$\stackrel{\Delta }{\to }$ $CuO\left(s\right)+C{O}_2$
2. When mercuric oxide is heated, it decomposes to give mercury and oxygen. The balanced equation for the reaction is,
$2HgO\stackrel{\Delta }{\to }2Hg+O_2$