Le Chatelier's law

Japanese: ル･シャトリエの法則 - ルシャトリエのほうそく（英語表記）Le Chatelier’s law

This law states that when a reaction mixture in a state of chemical equilibrium is subjected to an external change (such as temperature or pressure) that disrupts the equilibrium, the reaction will proceed in a direction that counteracts the change, and a new equilibrium state will be reached. This law was derived by HL Le Chatelier (1884) and KF Brown (1887), so it is also called the Le Chatelier-Brown law. For example, if heat is added to a system in chemical equilibrium to raise the temperature, the reaction will proceed in an endothermic direction, and if it is cooled to lower the temperature, the reaction will proceed in an exothermic direction, and a new equilibrium will be reached.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

化学平衡の状態にある反応混合物に，外部から平衡を破るような変動(温度や圧力など)が加わったとき，その変動を打ち消す方向に反応が進み新しい平衡状態に達するという法則。この法則はH.L.ル･シャトリエ(1884)およびK.F.ブラウン(1887)が導いたものなので，ル･シャトリエ=ブラウンの法則ともいう。たとえば，化学平衡にある系に熱を加えて温度を上げると，吸熱の方向に反応が進み，冷却して温度を下げると，発熱の方向に反応が進み新しい平衡に達する。

出典　株式会社平凡社世界大百科事典第２版について　情報

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