How specific gravity is measured?

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.

What do u mean by specific gravity?

Specific gravity, also called relative density, ratio of the density of a substance to that of a standard substance. If a substance has specific gravity less than that of a fluid, it will float on that fluid: helium-filled balloons will rise in air, oil will form a slick on water, and lead will float on mercury.

What is specific gravity unit?

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). It is therefore a relative quantity with no units.

What do we mean by specific gravity?

Specific gravity, also called relative density, ratio of the density of a substance to that of a standard substance. Because it is the ratio of two quantities that have the same dimensions (mass per unit volume), specific gravity has no dimension.

Where do we use specific gravity?

Specific gravity can be used to determine if an object will sink or float on water. The specific gravity of water is equal to one. If an object or liquid has a specific gravity greater than one, it will sink. If the specific gravity of an object or a liquid is less than one, it will float.

What is specific gravity of a mixture?

Specific gravity (sg) is properly defined as the ratio of the density of a substance (typically a liquid or a solid) compared to the density of water. Water has a density of 1.0 g/cc at normal pressure and temperature, so the specific gravity of a substance that is 1.6 times heavier than water would be equal to 1.6.

What is specific gravity example?

For example, liquid mercury has a density of 13.6 kg per litre; therefore, its specific gravity is 13.6. The gas carbon dioxide, which has a density of 1.976 grams per litre under standard conditions, has a specific gravity of 1.53 (= 1.976/1.29).

How to calculate the specific gravity of a material?

The following formula is used to calculate the specific gravity of a material. Where SG = specific gravity, ρ = density of the material (kg/m 3 ), ρW = density of water ( kg/m 3 ). The reference density of water at 4 o C (39 o F) is used as the reference as these are the conditions of maximum density.

How is the specific gravity used in pharmaceuticals?

Pharmaceuticals: The specific gravity is used to find out the purity of a drug since each of the constituents has a distinct specific gravity. Determining the additives used in a base material: Specific gravity is used to find out the amount of additives used in a base material which might affect the performance and stability of the base material.

Is the specific gravity of water the same as its density?

Since Specific Gravity – SG – is dimensionless, it has the same value in the SI system and the imperial English system (BG). SG of a fluid has the same numerical value as its density expressed in g/mL or Mg/m 3. Water is normally also used as reference when calculating the specific gravity for solids.

How is the specific gravity of ice calculated?

The density of ice can be calculated by interchanging the specific gravity formula as follows: For gases, the specific gravity is normally calculated with reference to air. Specific gravity for gases is defined as the ratio of the density of the gas to the density of air at a specified temperature and pressure.