What is the specific gravity of liquefied propane (LP)?

The specific gravity of a substance is a measure that compares the density of that substance to the density of water. For liquefied propane (LP), the specific gravity is approximately 0.49 (considering it as a gas under normal atmospheric conditions, and slightly different when in a liquefied state).

The choice reflecting a specific gravity of 1.52 is misleading in this context. When we understand specific gravity in relation to propane, it's essential to realize that values greater than 1.0 indicate that a substance is denser than water. However, this is not the case for liquefied propane, which is lighter than water.

Therefore, the correct specific gravity value is more aligned with approximately 0.49, meaning liquid propane is less dense than water, which explains its buoyancy when released into the atmosphere.

Understanding specific gravity in practical application is crucial for HVAC professionals as it affects the handling, storage, and safety measures regarding liquefied gases. It’s important to have accurate knowledge of the properties of fuels used in heating and cooling systems, as improperly handling these substances can lead to issues or hazards in the service environment.