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Brine is a solution of salt (usually sodium chloride) in water. In different contexts, brine may refer to salt solutions ranging from about 3.5% (a typical concentration of seawater, or the lower end of solutions used for brining foods) up to about 26% (a typical saturated solution, depending on temperature). Other levels of concentration are called in different names: It is held that 0 °F (−17.78 °C) was initially set as the zero point in the Fahrenheit temperature scale, as it was the coldest temperature that Daniel G. Fahrenheit could reliably reproduce by freezing brine.〔(gwydir.demon.co.uk )〕 ==Properties== At 100 °C (373.15 K, 212 °F), saturated sodium chloride brine is about 28% salt by weight i.e. 39.12 g salt dissolves in 100 mL of water at 100 °C. At 0 °C (273.15 K, 32 °F), brine can only hold about 26% salt.〔CRC Handbook of Chemistry and Physics, 63rd Edition 1982-1983.〕 The thermal conductivity of seawater (3.5% dissolved salt by weight) is 0.6 W/mK at 25 °C.〔(web.mit.edu )〕 The thermal conductivity decreases with increasing salinity and increases with increasing temperature; these graphs and online calculations plot thermal conductivity for varying salinity and temperature:〔(twt.mpei.ac.ru )〕 Density of brine at various concentrations and temperatures can be approximated with a linear equation: Density (lb/ft3)= a3 - (a2 *Temperature (F)) where the values of an are: 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「brine」の詳細全文を読む スポンサード リンク
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