What is the vapor density of propane?

The vapor density of propane is indeed 1.6. Vapor density refers to the mass of a substance's vapor compared to the mass of air. Since air has a vapor density of 1.0, a vapor density of 1.6 means that propane is heavier than air. This characteristic is important for firefighters to understand because it indicates that if propane is released into the environment, it will tend to settle in low-lying areas rather than disperse upwards. This property can significantly impact fire behavior and the potential for explosive environments, making it essential for safety measures and tactical planning during firefighting operations. Understanding the vapor density helps firefighters anticipate where gas accumulations might occur and how to effectively manage and mitigate any hazards associated with propane leaks.