What is the main risk when chlorine gas is exposed to heat?

When chlorine gas is exposed to heat, it can lead to a significant risk of explosions. Chlorine is a highly reactive element, and at elevated temperatures, the gas can rapidly expand and create an increase in pressure within a confined space. This pressure buildup can result in explosive scenarios, especially when chlorine is stored in containers not designed to withstand such thermal conditions.

In addition, the high temperatures can potentially cause chemical reactions that may release additional energy and further increase the risk of explosive reactions. Therefore, managing the heat exposure of chlorine gas is crucial in preventing hazardous situations.