important properties of seawater. ⢠Heat capacity of water (heat required to raise 1 deg C in water)= 1 calorie per gm of water. Latent heat of water(for melting): ...
By Prof. A. Balasubramanian
Introduction: • All water existing at or near the surface of the Earth belongs to the hydrosphere. • It includes atmospheric water vapor, rainwater, river water, groundwater, lake water, polar icecaps, sea and the ocean waters. • Water has its own physical, chemical and biological properties. • Water is classified into Freshwater, Brackish water, saline water, Brine are the types.
Water quality • Water quality is an important aspect on the earth. Occurs in three states. • Water is a universal solvent. • Water can dissolve ions present in soils and rocks. These are called as dissolvable salts. • While undergoing evaporation, water accumulates these salts and water becomes salty. • Ions are expressed in two units. One is milliequivalents per litre meq/L ort mg/L(ppm). • Total dissolved solids (TDS) is sum of all ions(ppm).
Water types • Rainwater has negligible amounts of salts ( TDS
