How do the following help in bringing about a chemical change? he… - Vidyadip

Question

How do the following help in bringing about a chemical change? heat.

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Answer

Some chemical reactions take place only in the presence of heat.
e.g. When lead nitrate is heated, it breaks into lead monoxide, nitrogen dioxide and oxygen.
$\underset{\text { (lead nitrate) }}{2 \mathrm{~Pb}\left(\mathrm{NO}_3\right)_2} \xrightarrow{\text { heat }} \underset{\text { lead monoxide }}{2 \mathrm{PbO}}+\underset{\text { nitrogen dioxide }}{4 \mathrm{NO}_2}+\mathrm{O}_2$

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