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What is the Density of Water? | Safe water Filter

density of water

What Is the Density of Water?

The density of water is about 1 gram per cubic centimeter (g/cm^3) or 1 kg per liter (kg/L) at standard temperature and pressure (STP). However, the density of water can vary slightly depending on temperature and pressure. For example, water is denser at 4°C than at any other temperature, and its density decreases as the temperature increases. Additionally, the density of water increases as the pressure increases.

Factors Affecting Water Density

At standard temperature and pressure, the density of water is about 1 gram per cubic centimeter (g/cm^3) or 1 kg per liter (kg/L).

The density of water can vary depending on temperature, pressure and presence of impuri . As water temperature decreases, its density increases, but this relationship is non-linear and unimodal.

At about 4°C, pure water reaches its maximum density. However, as the water temperature continues to drop, it expands and becomes less dense. This unusual negative thermal expansion is thought to be caused by strong intermolecular forces and orientation-dependent interactions similar to those of molten silica.

density vs temperature
Density vs Temperature
TemperatureDensity in kg/m3
60 °C983.2
40 °C992.2
30 °C995.65
25 °C997.04
22 °C997.77
20 °C998.2
15 °C999.1
10 °C999.70
4 °C998.97
0 °C999.83

Frequently Asked Questions

Q. What is the density of seawater?

The density of sea water varies depending on the salinity and temperature of the water. On average, the density of seawater is about 1.025 grams per cubic centimeter (g/cm^3) or 1.025 kilograms per liter (kg/L) at a salinity of 35 parts per thousand (ppt) and a temperature of 25 degrees Celsius. However, the density of seawater can range from about 1.020 g/cm^3 to 1.028 g/cm^3, depending on salinity and temperature.

Q. What is the density of water at 4 degree Celsius?

The density of water at 4 degrees Celsius (4°C) is about 998.9 kg/m3 or 998.9 kg/L, which is slightly less than 1 kg/L and is considered the maximum density of water at this temperature. This is because as water cools to 4°C, the molecules slow down, lose energy and as a result, they start to pack together. It is important to note that the density of water can vary depending on the pressure, impurities and other factors present in the water.

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