Table of Contents
Specific gravity is a dimensionless quantity; that is, it is not expressed in units. To find the sp gr of a solid or liquid, you must know its density in kilograms per meter cubed (kg/m3) or in grams per centimeter cubed (g/cm3).
Is specific gravity g mL?
The specific gravity of an object is the ratio between the density of an object to a reference liquid. Usually, our reference liquid is water, which has a density of 1 g/mL or 1 g/cm^3. The specific gravity has no units.
Is specific gravity in grams?
It is usually measured in grams per cubic centimeter, grams per milliliter, pounds per cubic foot or pounds per gallon, and is somewhat dependent on temperature and, to a lesser extent, pressure. Specific Gravity of liquids is most conveniently measured using a Hydrometer.
What is the unit for recording specific gravity?
Since specific gravity is the (weight per unit volume), simply divide the “material weight” (grams) by the “volume of cup” (milliliters) and this is your specific gravity in grams per milliliter.
Is specific gravity Unitless quantity?
Specific Gravity is a dimensionless number equivalent to relative density and is relative to water at a specific set of conditions; thus we divide the weight of any volume of a substance by the weight of the same volume of water.
What are the units of specific gravity quizlet?
(d or p) – the weight (mass) per unit volume of a substance. Units are grams per cubic centimeter. Mass of 1cc of water is 1 g.
How do you calculate the specific gravity of a diesel?
Volumetric Weight For example, Diesel Fuel has an approximate SG (Specific Gravity) of 0.82, so it is lighter than water (SG =1.0) so to calculate the weight of diesel in the same sized storage tank, simply multiply the volume(litres) by the specific gravity (SG) of the fluid.
How specific gravity is measured?
The specific gravity, then, may be determined by dividing the weight of a substance in grams by its volume in c.c.; but it is more convenient in practice to determine it by dividing the weight of the substance by the weight of an equal volume of water.
How is specific gravity of urine measured?
The health care provider uses a dipstick made with a color-sensitive pad. The color the dipstick changes to will tell the provider the specific gravity of your urine. The dipstick test gives only a rough result. For a more accurate result, your provider may send your urine sample to a lab.
How does hydrometer measure specific gravity?
A hydrometer is an instrument used to determine specific gravity. It operates based on the Archimedes principle that a solid body displaces its own weight within a liquid in which it floats. Hydrometers can be divided into two general classes: liquids heavier than water and liquids lighter than water.
What is Baume light hydrometer?
In hydrometer. The Baumé hydrometer, named for the French chemist Antoine Baumé, is calibrated to measure specific gravity on evenly spaced scales; one scale is for liquids heavier than water, and the other is for liquids lighter than water.
What is unit of hydrometer?
The hydrometer is considered to be an instrument to measure liquid density, marked in units of g/cm3, but corrections for other hydrometer scales can be determined as well.
How do you measure specific gravity of alcohol?
Specific gravity is measured by a hydrometer, refractometer, pycnometer or oscillating U-tube electronic meter. The density of a wort is largely dependent on the sugar content of the wort. During alcohol fermentation, yeast converts sugars into carbon dioxide and alcohol.
Why is specific gravity Unitless number?
In calculating the specific gravity of a substance, the density of the substance and the density of water are expressed in the same units. This leaves specific gravity unitless. Therefore, the density of solids or liquids expressed as g/mL is numerically equal to their specific gravities.
Why does specific gravity have no units?
Specific gravity has no units because it’s a ratio of density divided by density, so all units cancel out. Anything with a density greater than 1,000 sinks in pure water at 4 degrees Celsius, and anything with a density less than 1,000 floats.
What is the specific gravity of water in English units?
The specific weight, also known as the unit weight, is the weight per unit volume of a material. A commonly used value is the specific weight of water on Earth at 4 °C (39 °F), which is 9.807 kilonewtons per cubic metre or 62.43 pounds-force per cubic foot.
Is specific gravity a derived quantity?
Specific gravity is a dimensionless quantity; that is, it is not expressed in units. To find the sp gr of a solid or liquid, you must know its density in kilograms per meter cubed (kg/m3) or in grams per centimeter cubed (g/cm3). An object with a density of 85 g/cm3 has a specific gravity of 85, and will sink rapidly.
Are density and specific gravity the same?
Density is defined as mass per unit volume. It has the SI unit kg m–3 or kg/m3 and is an absolute quantity. Specific gravity is the ratio of a material’s density with that of water at 4 °C (where it is most dense and is taken to have the value 999.974 kg m–3).
What is specific gravity quizlet?
specific gravity. a ratio, expressed decimally, of the weight of a substance to the weight of an equal volume of a substance chosen as a standard, both substances at the same temperature.
What is the SG of diesel?
Specific Gravity Resource Liquid SG @ 60°F / 15.6°C Diesel Fuel Oils 20 0.82 – 0.95 Ethylene Glycol 1.125 Gasoline 0.68 – 0.74 Kerosene 0.78 – 0.82.
What is specific gravity of gasoline?
The specific gravity of pump gas will typically range from about 0.720 to 0.770. As you can now guess, this wide range is a reflection of the wide ranging composition. Pump gas composition varies by octane, by region, and by season.
What is the specific gravity of butane?
2.076 Molecular Weight: 58.124 Boiling Point @ 1.0 atm. : 31.1° Freezing Point @ 1 atm. : -217.0° Specific Gravity, Gas @ 60° F., 1 atm. (Air = 1): 2.076.
