Which hazard is most associated with potential runaway reactions caused by polymerization or decomposition?

Which hazard is most associated with potential runaway reactions caused by polymerization or decomposition?

• A. Color change
• B. Polymerization or decomposition potentially leading to runaway
• C. Pressure relief failure
• D. Sound emission

Answer: (B)

Thermal runaway from exothermic polymerization or decomposition is the hazard being tested. When a polymerizing or decomposing reaction generates heat faster than it can be removed, the temperature rises, which speeds up the reaction even more. This self-accelerating loop can cause a rapid, uncontrolled release of heat and pressure, potentially leading to vessel rupture, venting, or an explosion if containment is overwhelmed. That’s the key danger: the reaction becomes self-propagating due to inadequate heat removal. Other options don’t capture this driving hazard. A color change is merely an observable sign and does not define the risk of an uncontrolled reaction. Pressure-relief capability, while crucial for mitigating consequences, describes a protective feature rather than the underlying hazard itself. Sound emission may occur, but it isn’t the hazard associated with runaway reactions.

Thermal runaway from exothermic polymerization or decomposition is the hazard being tested. When a polymerizing or decomposing reaction generates heat faster than it can be removed, the temperature rises, which speeds up the reaction even more. This self-accelerating loop can cause a rapid, uncontrolled release of heat and pressure, potentially leading to vessel rupture, venting, or an explosion if containment is overwhelmed. That’s the key danger: the reaction becomes self-propagating due to inadequate heat removal.

Other options don’t capture this driving hazard. A color change is merely an observable sign and does not define the risk of an uncontrolled reaction. Pressure-relief capability, while crucial for mitigating consequences, describes a protective feature rather than the underlying hazard itself. Sound emission may occur, but it isn’t the hazard associated with runaway reactions.