Effect of molecular spectroscopy is the main way to provide internal information molecules, molecular spectra based on the moment of inertia of the molecule can be determined, the molecular bond lengths and bond strength as well as many of the properties of molecular dissociation energy, etc., whereby the molecular structure can be presumed. Internal molecular motion state changes generated by the absorption or emission spectrum (from ultraviolet to far infrared until microwave spectrum). Molecular motion, including rotation of the whole molecule, the molecular vibrations of atoms in the molecule as well as the movement of electrons within the equilibrium position, therefore, are generally three types of molecular spectroscopy: rotational spectra, vibrational spectroscopy and electron spectroscopy. Molecular electronic transitions at different energy levels to generate the electronic spectrum. Because they are in the ultraviolet and visible region, also known as UV-visible spectroscopy. Electronic transitions often accompanied by a smaller energy vibrational transitions, so it is band spectrum. Unlike the same electron energy state vibration level corresponding to the transition vibration spectrum, this part of the spectrum in the infrared region and called IR. With the rotational energy levels of vibration transitions, so this part of the spectrum there are more dense spectral lines, it is also known rovibrational spectrum. By purely rotational molecular transitions between energy levels produced spectrum called rotational spectrum. This longer wavelength part of the spectrum is generally located in the far-infrared region and the microwave region and called far-infrared spectroscopy or microwave spectrum. Clausius this state parameter named entropy. About the choice of the term entropy butyl acetate, Clausius wrote: In determining the amount of a number of important scientific name, I would rather resort to the ancient text Beijing butyl acetate, purpose of doing so is to make these name can have the same meanings in various existing text, so I propose to object s called entropy, entropy means "change" in the Greek word. Clausius therefore introduce a new term at the effort, which aims to make people not cause any association. May 25, 1923 the price of butyl acetate, the German physicist Max Planck R. Southeast University for academic reports second law of thermodynamics and entropy concept. Professor Hu Gangfu one of the pioneers of the physical sciences, the entropy translated as "entropy." He believes that the concept of entropy is too complex, from the heat and temperature changes than the original, he put words together beside the fire quotient word, translated into entropy. Quotes butyl acetate, butyl acetate, Ningxia, Xiang Xiang dry dry chemical from Jinan Chemical Limited. Jinan Cheung Dry Chemical Co. (www.xiangqianhuagong.com) (www.dilunyierchun.com) strong, credible, in Jinan, Shandong alcohol industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xiang dry chemical into the brilliant and you work for a better future! You can also access (www.dilunyierchun.com/supply_details_39703455.html), for more information about the company.