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chemical change
[ kem-i-kuhl cheynj ]
noun
- Chemistry. a usually irreversible chemical reaction involving the rearrangement of the atoms of one or more substances and a change in their chemical properties or composition, resulting in the formation of at least one new substance:
The formation of rust on iron is a chemical change.
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Word History and Origins
Origin of chemical change1
First recorded in 1755–65
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Example Sentences
The organic remains met with in the rocks have usually undergone some chemical change.
From Project Gutenberg
During the roasting process the coffee undergoes a great chemical change.
From Project Gutenberg
Where the particles touch each other, there is such a chemical change produced as renders them fit for the use of plants.
From Project Gutenberg
A chemical change must take place in it and the nitrogen be built into nitric acid and nitrates.
From Project Gutenberg
We do not want to dry cheese; we want to cure it; that is, let it go through the proper chemical change.
From Project Gutenberg
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