Sunday, July 13, 2008
The original distinction between organic and inorganic chemistry arose as chemists gradually realized that compounds of biological origin were quite different in their general properties from those of mineral origin; organic chemistry was defined as the study of substances produced by living organisms. However, when it was discovered in the 19th cent. that organic molecules can be produced artificially in the laboratory, this definition had to be abandoned. Organic chemistry. is most simply defined as the study of the compounds of carbon. Inorganic chemistry. is the study of chemical elements and their compounds (with the exception of carbon compounds).
Physical chemistry. is concerned with the physical properties of materials, such as their electrical and magnetic behavior and their interaction with electromagnetic fields. Subcategories within physical chemistry are thermochemistry, electrochemistry, and chemical kinetics. Thermochemistry is the investigation of the changes in energy and entropy that occur during chemical reactions and phase transformations (see states of matter). Electrochemistry concerns the effects of electricity on chemical changes and interconversions of electric and chemical energy such as that in a voltaic cell. Chemical kinetics is concerned with the details of chemical reactions and of how equilibrium is reached between the products and reactants.
Analytical chemistry. is a collection of techniques that allows exact laboratory determination of the composition of a given sample of material. In qualitative analysis all the atoms and molecules present are identified, with particular attention to trace elements. In quantitative analysis the exact weight of each constituent is obtained as well. Stoichiometry is the branch of chemistry concerned with the weights of the chemicals participating in chemical reactions. See also chemical analysis.
Sunday, June 29, 2008
Tuesday, June 24, 2008
Tuesday, May 27, 2008
Friday, April 11, 2008
Chemistry is the science that deals with and investigates the composition, properties, and transformation of substances and various elementary forms of matter.
The chemistry major provides broad and comprehensive training in all areas of modern chemistry.
The program includes course work in the major subdisciplines of chemistry - inorganic, organic, physical, biological and analytical.
The curriculum is designed to permit the student a wide range of career choices including, but not limited to, chemistry, medicine, law, business, chemical physics, environmental science, and secondary school teaching.
A Sample of Related Occupations
Cooperative Extension Agent
Crime Lab Analyst
Environmental Health Specialist
Occupational Safety Specialist
Pharmaceutical Sales Rep.
Quality Control Manager
Science Laboratory Technician
Water Purification Chemist
Water/wastewater Plant Manager
Chemistry is the study of interactions of chemical substances with one another and energy
Chemistry (from Egyptian kēme (chem), meaning "earth") is the science concerned with the composition, structure, and properties of matter, as well as the changes it undergoes during chemical reactions. Historically, modern chemistry evolved out of alchemy following the chemical revolution (1773).
Chemistry is a physical science related to studies of various atoms, molecules, crystals and other aggregates of matter whether in isolation or combination, which incorporates the concepts of energy and entropy in relation to the spontaneity of chemical processes.
Disciplines within chemistry are traditionally grouped by the type of matter being studied or the kind of study. These include inorganic chemistry, the study of inorganic matter; organic chemistry, the study of organic matter; biochemistry, the study of substances found in biological organisms; physical chemistry, the energy related studies of chemical systems at macro, molecular and submolecular scales; analytical chemistry, the analysis of material samples to gain an understanding of their chemical composition and structure. Many more specialized disciplines have emerged in recent years, e.g. neurochemistry