What is the weight of propane per gallon?

The weight of propane per gallon is approximately 4.2 pounds. This value is important in various applications, particularly in the calculations for buoyancy in lighter-than-air craft, where knowing the weight of the fuel can impact overall weight management and performance. Propane is a commonly used fuel for hot air balloons and airships, and understanding its weight is crucial for pilots to ensure safe and efficient operations.

The other options provide weights that do not align with the commonly accepted weight measurement for propane at 60°F, which is a standard reference point for this type of calculation. In practical applications, using the accurate weight allows for better planning regarding fuel usage and overall load calculations for lighter-than-air vehicles.