PRESENTATION OUTLINE
Phosphorus: the chemical element of atomic number 15, a poisonous, combustible nonmetal that exists in two common allotropic forms, white phosphorus, a yellowish waxy solid that ignites spontaneously in air and glows in the dark, and red phosphorus, a less reactive form used in making matches.
Phosphorus cycle: Phosphorus is commonly found in water, soil and sediments. Phosphorus cannot be found in air in the gaseous state. This is because phosphorus is usually a liquid at standard temperatures and pressures. Phosphorus is mainly cycled trough water, soil and sediments. However, very small particles in the atmosphere may contain phosphorus or its compounds. Phosphorus moves slowly from deposits on land and in sediments, to living organisms, and much more slowly back into the soil and water sediment. The phosphorus cycle is the slowest one of the sedimentary cycles.
Thermodynamics 1st law:
This law is often called the law of conservation of energy. Simply stated , this law states that energy can be changed from one to another but it cannot be created or destroyed. Energy constantly changes from one to another, but the total amount of energy available in the universe is constant.
The 2nd law of Thermodynamics:
This law states that in all energy exchanges, if no energy enters or leaves the system, the potential energy of the new state will always be less than that of the initial state. In other words, no form of energy converts entirely to another form.
