Canadian Entry To Practice (CETP) Practice Test

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A liquid substance with a specific gravity of .805 is what compared to liquid propane?

Lighter
Heavier
Equal
Uncertain

The correct answer is: Heavier

The specific gravity of a substance is a comparison of its density to the density of water. A specific gravity less than 1 indicates that the substance is less dense than water, while a specific gravity greater than 1 indicates that it is denser than water. In this case, the substance has a specific gravity of 0.805. This means that it is less dense than water, since water has a specific gravity of 1. Now, when considering liquid propane, it has a specific gravity of approximately 0.493. Since our substance (with a specific gravity of 0.805) is denser than propane, it will sink when placed in liquid propane, indicating that it is heavier in relation to liquid propane. The reasoning leads us to conclude that the correct characterization of the substance relative to liquid propane is that it is heavier.