Which property is associated with liquefied petroleum gas (LPG)?

The property associated with liquefied petroleum gas (LPG) is that it is heavier than air. This characteristic is important for firefighters and safety personnel to understand, as it influences how LPG behaves when released into the atmosphere. When LPG is leaked, it can accumulate in low-lying areas, leading to potential hazards such as explosions or asphyxiation risks.

Understanding that LPG is heavier than air allows responders to predict where the gas might concentrate and to plan their actions accordingly, ensuring safer handling and response strategies. For instance, when ventilating an area with a suspected leak, responders would focus on high points rather than low-lying areas to prevent the gas from pooling.

While LPG indeed is flammable, it has specific temperature requirements to ignite and is not flammable at all temperatures, so that aspect is not correct in the context of this question. Similarly, although it evaporates quickly when released into the air, it is the relative density to air that is a defining characteristic for safety and operational protocols.