Final answer:
A self-reactive substance is a chemical compound that can decompose on its own without the need for external stimuli. Conditions that may initiate the decomposition include heat, light, or humidity. Hydrogen peroxide is an example of a self-reactive substance that decomposes when exposed to heat.
Step-by-step explanation:
A self-reactive substance refers to a chemical compound that is capable of decomposing under certain conditions without the need for external stimuli or interaction with another substance. It undergoes a decomposition reaction on its own. Self-reactive substances are usually unstable or highly reactive due to the presence of reactive functional groups or bonds.
The conditions that may initiate the decomposition of a self-reactive substance vary depending on the specific compound. Some common conditions include exposure to heat, light, or humidity. For example, hydrogen peroxide (H2O2) is a self-reactive substance that can decompose when exposed to heat, releasing oxygen gas (O2) and water (H2O) as products.