…In thermodynamics, a narrower definition is that a process that can follow the same path in the opposite direction by making infinitesimal changes to the outside world is called a reversible process, and such changes are called reversible changes. This can be achieved by making very small changes in state from the state of thermal equilibrium, such as when compressing or expanding a gas by moving a piston very slowly, and such reversible processes are called quasistatic processes. In general, processes in which work is converted into heat, such as the generation of heat due to friction, are typical irreversible processes, while electromagnetic phenomena that do not involve the generation of heat are reversible processes. … *Some of the terminology that mentions "quasistatic process" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…熱力学ではもっと狭く,外界に無限小の変化を与えるだけで同じ道筋を逆にたどれる過程を可逆過程といい,そのような変化を可逆変化と呼んでいる。これは,例えばピストンをきわめてゆっくり動かして気体を圧縮あるいは膨張させる場合のように,状態の変化を熱平衡の状態からきわめてわずかずつ変化させることによって実現でき,このような可逆過程は準静的過程quasistatic processと呼ばれる。一般に,摩擦による熱の発生など仕事が熱に変わる過程は典型的な不可逆過程であり,一方,熱の発生を伴わない電磁気現象は可逆過程である。… ※「quasistatic process」について言及している用語解説の一部を掲載しています。 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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