- kagakuhenka chemical change
This term is standard in school science, distinguishing chemical from physical changes; learners meet it in textbooks, not casual talk.
鉄がさびるのは化学変化だ。
Tetsu ga sabiru no wa kagakuhenka da.
Iron rusting is a chemical change.
化学変化で新しい物質ができる。
Kagakuhenka de atarashii busshitsu ga dekiru.
A chemical change produces a new substance.
⚖️ Do not confuse with 化学反応 (kagakuhannou), which refers to the reaction process itself, while 化学変化 focuses on the resulting change.
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