Using water as the reference substance,what is the specific gravity of ethanol at 20 degrees Celsius?

Question

Using water as the reference substance,what is the specific gravity of ethanol at 20 degrees Celsius?

Answer 1

0.789

Answer 2

The Density of a liquid or solid divided by the density of water will give the Specific Gravity of the substance,

Ethanol Density = 0.789g/mL. Water density = 1.0g/mL.

S.G of Ethanol = 0.789g/mL ÷ 1.0g/mL = 0.789.

The g/mL units cancel each other out leaving a unit-less figure which is the Specific Gravity.