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Density of Water at Different TemperaturesĪs the environmental temperature drops down below the room temperature, the corresponding water density is higher than 997.77 kg m 3. As water freezes to its solid form of ice, the density is reduced to about 9 percent. This is the reason why ice blocks (less dense than water) floats on the surface of the ocean water. When temperature is further cooled down to the freezing point, water solidifies and expands, resulting in low density. It is found to be highest when the surrounding temperature is 4° C. To be more precise, water density is higher in colder temperatures, until a certain limit. The density of water is both directly or indirectly proportional to temperature.
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In general, the density of a matter is higher in solid form, as compared to the density of the same matter in liquid form. However, as we are discussing the density of water measured in ground level for collected water samples, the pressure attribute is not considered in determining the density. Of course, pressure does play a role in the subject of water denseness. While discussing this topic in detail, water density is found to vary with respect to the level of salinity (or other impurities) and fluctuation of temperature. However, it is to be noted that grams per milliliter (g/mL) and gram per cubic centimeter (g/cm 3) are not SI units. The logic is to divide the value of kg/m 3 by 1000 to get pure water density in g/ml. In other words, at the same temperature, the density of water in g/ml (or g/cm 3) is 0.99777. At room temperature (i.e., 22° C), the density of water in kg/m 3 is 997.77. With respect to the definition, the density formula is represented as Density (ρ) = Mass (m)/Volume (V). This means that its density at a particular temperature remains the same, every time a measurement is made, irrespective of the sample size. Water density is classified under the category of intensive properties. Represented by the symbol ρ (rho), the SI unit of density is kilograms per cubic meter (kg/m 3). This aspect is useful to determine the buoyancy and purity of a material. In physics, the density of a substance refers to the mass (or weight) per unit volume. In contrast to other substances, solid water is less dense than liquid water, or in other words, ice is lighter than water. It is the only compound that exists in all the three phases of matter, viz. Water is undoubtedly the most abundantly found chemical substance on earth. This article provides information regarding density of water at different temperatures, including the density value at room temperature.