physical change

…Generally, when a material system undergoes a change in the type of substance (chemical species), it is called a chemical change, and when the type of substance does not change and only its state changes, it is called a physical change. The process that causes a chemical change is called a chemical reaction, and during the chemical reaction, chemical bonds are broken or created within the molecules and atoms that make up the substances involved in the reaction.

*Some explanations of terms that mention "physical change" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…一般に物質系が示す変化のなかで，物質の種類(化学種)が変化する場合を化学変化といい，物質の種類は変化せずその状態のみが変化する場合を物理変化physical changeという。化学変化をひき起こす過程を化学反応といい，化学反応の過程で，反応に関与する物質を構成する分子･原子内で化学結合の切断･生成が起こる。…

※「physical change」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