Which type of hazard is associated with high-energy reactions to water?

The correct response is associated with materials that can react violently or produce hazardous conditions when they come into contact with water. Water-reactive substances can release flammable or toxic gases, or they may even lead to explosions due to rapid decomposition or exothermic reactions.

Understanding water-reactive hazards is vital for safe handling and storage practices, especially in environments where these materials may be present. This category includes certain metals like sodium or potassium, as well as some chlorides, which can react with moisture or water to produce hazardous outcomes.

The other choices represent different types of hazards. Organic peroxides, for example, are a class of substances that can be highly reactive, but they are primarily characterized by their potential to undergo exothermic reactions, rather than specifically regarding their reaction to water. Combustible materials are those that can ignite and sustain combustion, but they don’t necessarily indicate a specific reaction to water. Compressed gases present risks related to pressure and potential for explosion if released rapidly, but they are not defined by their interaction with water either.