Summary of EL AGUA: Propiedades químicas, físicas y biológicas

00:00:00 - 00:10:00

This video discusses the chemical and physical properties of water, and how they affect organisms. It also discusses how water plays a role in transportation and metabolism. Finally, it discusses the role of water in human health and the environment.

• 00:00:00 Water is a vital substance that is essential for life. In 1781, English scientist Sir William Cavendish discovered that water is a compound, not an elemental. In 1783, French scientist Joseph Lavoisier revealed that water is composed of oxygen and hydrogen atoms. In 1804, German scientist Friedrich Gay-Lussac and American scientist Benjamin Franklin demonstrated that water contains two volumes of hydrogen for each volume of oxygen. In addition, scientists now know that in water molecules, the atoms of hydrogen are bonded to oxygen atoms via covalent links. Water also exhibits nonlinear geometry, with the two hydrogen atoms forming an angle of 104.45 degrees between them. In 1816, British scientist Henry Gay-Lussac and American scientist Charles-François de la Condamine demonstrated that water contains two volumes of hydrogen per molecule. Finally, in 1911, the German chemist Otto Hahn was the first person to discover that water is a polar molecule.
• 00:05:00 Water can maintain its form for a certain time independent of where it is submerged in its liquid phase; molecules separate, which makes water take on the form of the container it is contained in in its gas phase; the molecules are completely separated and disordered, which leads to water becoming gas or vapor. Two temperature markers that are stable over time the water reaches its freezing point at 0 degrees Celsius and its boiling point at 100 degrees Celsius. High specific heat of water indicates that it needs one calorie per gram to raise the temperature of one gram of water by one degree Celsius. This value indicates that it is difficult to cool or warm water, and it is considered an excellent temperature regulator. Four forces of cohesion between molecules make water a liquid that is incomprehensible in terms of its high surface tension and the phenomenon of capillaryity. Water is practically incomprehensible, that is, the amount of volume and mass remain virtually equal to one another at a low pressure. Notice the superficial effect that is the physical phenomenon of a water liquid membrane. Water's high structural density in a liquid state accounts for its high water content in ice.
• 00:10:00 Water has many properties, including chemical, physical, and biological ones. This video discusses some of the chemical and physical properties of water, and how they affect organisms. It also discusses how water plays a role in transportation and metabolism. Finally, it discusses the role of water in human health and the environment.