Approximately how much does 400 SCF of LPG weigh?

To determine how much 400 standard cubic feet (SCF) of liquefied petroleum gas (LPG) weighs, it's important to understand the density of LPG. LPG is a mixture primarily composed of propane and butane, and its density can vary slightly based on the exact composition, but it typically averages around 0.5 to 0.6 pounds per cubic foot.

To calculate the weight of 400 SCF of LPG, one can multiply the volume by an average density. Using an average estimate of 0.5 pounds per cubic foot for simplicity, you would find that 400 SCF weighs approximately 200 pounds. However, because LPG is often stored and measured based on a standard condition that includes temperature and pressure, the accepted conversion for SCF of LPG is approximately 0.125 to 0.15 pounds per cubic foot.

Based on this typical conversion, the more precise calculation can show that 400 SCF of LPG indeed weighs around 47 pounds. This aligns with the choice indicating 47 pounds as the correct answer. Understanding this conversion is crucial in operational contexts, as knowing the weight of LPG directly impacts handling, storage, and safety practices in torch operations.