Why the gas is irreversible when green gas is heated?

When green gas is heated, it undergoes a change in state or chemical composition, often resulting in the release of gases or other byproducts. This process is typically irreversible because the original molecular structure of the gas may break down or transform into new compounds, making it impossible to revert to the original state upon cooling. Additionally, factors such as energy input and entropy changes contribute to the irreversibility of the process.