What are the specific gravities for propane vapor and propane liquid?

What are the specific gravities for propane vapor and propane liquid?

• A. Vapor 1.3 and Liquid .7
• B. Vapor 1.4 and Liquid .6
• C. Vapor 1.6 and Liquid .4
• D. Vapor 1.5 and Liquid .5

Answer: (D)

Propane’s densities are given as specific gravities relative to air (for the vapor) and relative to water (for the liquid). The vapor form of propane is heavier than air, with a typical specific gravity of about 1.5. That means when propane vapor leaks, it tends to stay low and collect in low spots unless there is good ventilation, which is important for safety. For the liquid, propane is about half the density of water, giving a specific gravity around 0.5. So liquid propane is lighter than water and will float on it if spilled. The combination that matches these common values is vapor around 1.5 and liquid around 0.5. Other options differ from these standard densities and don’t reflect propane’s usual heaviness in vapor and its lightness relative to water.

Propane’s densities are given as specific gravities relative to air (for the vapor) and relative to water (for the liquid). The vapor form of propane is heavier than air, with a typical specific gravity of about 1.5. That means when propane vapor leaks, it tends to stay low and collect in low spots unless there is good ventilation, which is important for safety.

For the liquid, propane is about half the density of water, giving a specific gravity around 0.5. So liquid propane is lighter than water and will float on it if spilled.

The combination that matches these common values is vapor around 1.5 and liquid around 0.5. Other options differ from these standard densities and don’t reflect propane’s usual heaviness in vapor and its lightness relative to water.