Answer;
HI (g) → H₂(g) + I₂(g)
Step-by-step explanation;
- Decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds.
- In decomposition reactions a complex substance breaks down into at least two or more simpler substances. They are opposite of synthesis reactions and may require energy to occur.
- The general formula for these reactions is; AX → A + X
Example; HI (g) → H₂(g) + I₂(g)