Question

What happens when Ammonium nitrate is heated?

Answer 1

When Ammonium nitrate is heated, it decomposes exothermically into Nitrous oxide and water.

${\mathrm{NH}}_4{\mathrm{NO}}_3\left(\mathrm{s}\right)\stackrel{∆}{\to }2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)+{\mathrm{N}}_2\mathrm{O}\left(\mathrm{g}\right)$

The decomposition reaction thus leads to only gaseous products.