![]() ![]() Its properties are distinct from those of its component elements in the following ways: Properties Water is composed of Hydrogen and Oxygen in the ratio of 2:1. ![]() The properties of water are different from the properties of the elements of which it is formed. The property of anomalous expansion water enables marine life to exist in the colder regions of the world because even when the water freezes on the surface, it remains in liquid state below the ice layer as the density of water is greater than the density of ice and ice is a bad conductor of heat. How do fishes and aquatic animals survive in winters when the pond gets covered with thick ice? The boiling point of water increases and the melting point of water decreases due to the presence of dissolved impurities in it. What is the effect of impurities present in water on melting point and boiling point of water? It can cause pipes to burst in winter season because when water freezes it expands slightly.It enables marine life to exist in the colder regions of the world because even when the water freezes on the surface, it remains in liquid state below the ice layer as the density of water is greater than the density of ice and ice is a bad conductor of heat.Therefore, with relative density of ice being 0.92, it floats on water. Water expands on freezing, i.e., 92 volumes of water become 100 volumes of ice.Its density decreases as the temperature increases or decreases from this point. What are its consequences?Īt 4☌, water has its maximum density, 1g/cm 3 or 1000 kg/m 3, and minimum volume. Question 6(b)ĭensity of water varies with temperature. Land and sea breezes also take place because of this great moderating property of water. Which property of water enables it to modify the climate ?ĭue to it's high specific heat capacity, the presence of a large amount of water is able to modify the climate of the nearby land areas, making them warmer in winter and cooler in summer. The sudden release of latent heat of condensation causes the violence associated with torrential rain. What causes the violence associated with torrential rain? For the same reason, water is called a universal solvent. Not only solids but gases and other liquids can also dissolve in water to a large extent. Water dissolves many substances, forming aqueous solutions (water solutions). This property allows sweat to evaporate from the skin, taking heat from the body and cooling it down. High latent heat of vaporization - As water has a high latent heat of vaporization, it requires a large amount of heat energy to change from liquid to gas.High specific heat capacity - Water has a high specific heat capacity enabling it to absorb heat from the body and release it to the environment without causing significant changes in its own temperature.(b) Properties of water responsible for controlling the temperature of our body: Hence, the temperature in Mumbai and Chennai does not fall as low as it does in Delhi. Land and sea breeze also take place because of this great moderating property. As water has high specific heat capacity, the presence of a large amount of water is able to modify the climate of the nearby land areas, making them warmer in winter and cooler in summer. (a) Mumbai and Chennai are on the shores of the sea. (b) Give the properties of water responsible for controlling the temperature of our body. (a) Why does temperature in Mumbai and Chennai not fall as low as it does in Delhi. Henry Cavendish synthesized water from it's elements by igniting the elements in their respective ratio, thereby leading to the conclusion that water is not an element but a compound of hydrogen and oxygen combined in the ration 2:1. Food products - Green vegetables, Milk, Dry cereals.Human body - Nearly, 70% of the body weight.Earth's surface - Covers nearly 75% of earth's surface.Water is present in hydrated salts e.g., MgCl 2.6H 2O and in certain minerals.Water occurs in the combined form in all living matter i.e., plants and animals.Gaseous state - as water vapour, clouds, mist, fog.Below the earth's surface in well water and moisture accumulation in the soil.On the earth's surface as river, water, lake water, sea water, spring water.Solid state - In the form of ice, snow, frost.It occurs in both free as well as combined states. Water exists in all the three physical states : as solid (ice), as liquid (water) and as gas (water vapour). ![]()
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