![]() ![]() Density of Water at Different Temperatures Besides that, it is the only substance on Earth, to exist in all the three general phases of matter, which are solid, liquid, and gas. An interesting fact about water is that it is the only substance where the density in solidified form is less than its liquid form. It differs by about 9 and therefore ice floats on liquid water. It has a maximum of density at 3.98 C (1000 kg/m 3 ), whereas the density of ice is 917 kg/m 3. Water differs from most liquids in that it becomes less dense as it freezes. Water expands after freezing, increasing its volume by 9%, and that is why the density of ice is less than that of water. Pure water has its highest density 1000 kg/m3 at temperature 3.98oC (39.2oF). However, with changes in temperature, pressure, and addition of impurities, the density of water also changes. Density is an intensive property at any particular temperature. This value is stable and constant at any particular temperature, when the water is devoid of any impurities. ![]() What is the Density of Water?Īt room temperature (20° C), the density value is 1 g/cm 3 or 1000 kg/m 3. In CGS system, the unit of density is gram per cubic centimeter or g/cm 3. This unit can be easily derived by putting the SI units of mass and volume in the density formula, which are kilogram and cubic meter. According to the SI system of units, the unit of density is kilogram per cubic meter or Kg/m 3. This leads to changes in volume, and hence, also in density. Without dust, smog, and particulates in the air. An increase or decrease in temperature causes the expansion or contraction, respectively, in the size of the object. To the human eye, air is nearly invisible while water is clearly visible. Simply said, wood is less dense than water, and rocks are denser than water.ĭensity of an object depends on the temperature. This tells us that density of water at room temperature or normal average temperature is more than the wood and less than the rock. For instance, a log of wood floats in water, but a rock sinks in it. In chemistry, density of water at room temperature is used as a parameter to compare the densities of various other objects.ĭoes a substance float or sink in water? This gives us an idea about the density of a substance. It is a very fluctuating parameter that depends on various factors like mass and volume of water, temperature, and atmospheric pressure. Water, with its unique physical and chemical properties, has various interesting characteristic features, and one of them is its density. This discovery indirectly paved the path for study and analysis of volume and density in the subsequent years. An interesting anecdote that is related to the concept of density is the running of Archimedes, naked in the streets of Greece, shouting ‘Eureka, Eureka’, after he discovered a method to determine the volume of an object with an irregular shape. The term ‘density’ is a characteristic property of every object, and it forms a basic topic of study in science. Use your knowledge of density to create a colorful rainbow inside of a drinking straw. ![]()
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