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<a accesskey="3" href="page.php?w=Thermal_decomposition&amp;p=2">3.Next</a>
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<p><b>Thermal decomposition</b>, or <b>thermolysis</b>, is a <a href="page.php?w=chemical_decomposition">chemical decomposition</a> of a substance caused by heat. The decomposition temperature of a substance is the <a href="page.php?w=temperature">temperature</a> at which the substance chemically decomposes. The reaction is usually <a href="page.php?w=Endothermic_process">endothermic</a>  as heat is required to break <a href="page.php?w=chemical_bond">chemical bond</a>s in the compound undergoing decomposition. If decomposition is sufficiently <a href="page.php?w=Exothermic_process">exothermic</a>,</p><p>
<a accesskey="3" href="page.php?w=Thermal_decomposition&amp;p=2">3.Next</a>
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