# Specific volume and relationship

### Pressure-volume work (formula for work) (article) | Khan Academy

Download scientific diagram | relationship between specific volume and isotropic stress. from publication: Principles of Physical Modelling of Unsaturated Soils. In thermodynamics, the specific volume of a substance is the ratio of the substance's volume to . The chart below is a visual representation of the relationship between specific volume and temperature. As stated above, specific volume varies. relationship between specific volume and the crystallinity of cellulose is expressed in the equation (1) in this report [3]. The specific volume of starch is calculated.

As a result, temperature and pressure can greatly affect the volume of a substance, especially gases. As with mass, increasing and decreasing the amount of material also increases and decreases the volume of the substance. For example, 10 grams of freshwater has a volume of 10 milliliters.

### How Are Density, Mass & Volume Related? | Sciencing

Unlike mass and volume, increasing the amount of material measured does not increase or decrease density. This makes density a useful property in identifying many substances.

However, since volume deviates with changes in temperature and pressure, density can also change with temperature and pressure. Specific Gravity One derivative measurement of density is specific gravity. Specific gravity compares the density of a substance with the density of a reference material.

• Specific volume
• Pressure-volume work

In the case of gases, the reference material is standard dry air, or air without water. In the case of liquids and solids, the reference material is fresh water.

Specific gravity is calculated by dividing the density of a substance by the reference substance's density. For example, gold has a density of This yields a specific gravity of This means gold is Buoyancy Whether an object floats or sinks is determined by the downward force of gravity and an upward buoyant force. If the buoyant force is greater, an object floats.

SPECIFIC VOLUME

If the force of gravity is greater an object sinks. Pistons are actually used in many mechanical applications all around us, such as inside a gasoline engine.

## Liquid-Solid Relationships Specific Gravity Specific Volume

I usually imagine a piston looking very similar to a bicycle tire pump, but here's some more information about what real pistons look like in case you are interested!

Here is a picture of the insides of a gasoline engine that shows two pistons side-by-side: A picture of a petrol-engine that has been cut in half to show the cross section of 2 side-by-side pistons. The piston on the left is arranged with a larger volume than the piston on the right.

Schematic of a piston showing the movement of the piston head as the volume inside the piston changes. Two tubes leading to the piston can let gas in and out of the piston to regulate the movement of the piston.

### Specific volume - Wikipedia

Schematic of piston in movement by R. In a gasoline engine, the pressure inside the piston changes when the fuel is combusted inside the piston, releasing thermal energy and causing the volume inside the piston to increase.

The volume inside the piston decreases when the gas is allowed to escape from the piston. As that process is repeated, your wheels can move!

If the gas is heated, energy is added to the gas molecules. We can observe the increase in average kinetic energy of the molecules by measuring how the temperature of the gas increases.