Concept 2 of 8Foundation
Watch on YouTubeVideoReversible vs irreversible
Reversible: can be undone. The substance returns to its original form.
- Ice ⇄ water ⇄ vapour (states of water)
- Stretching a rubber band
- Rolling a dough ball flat and back
- Switching a fan on/off
Irreversible: cannot be undone.
- Burning wood (ash can't become wood)
- Cooking an egg
- Rusting of iron
- Ripening of fruit
- Paper torn
Example
Cutting a cake = irreversible (pieces can't become whole).
Folding paper = reversible.
Folding paper = reversible.
💡 Tip:If you can easily return to the original, it's reversible. Otherwise irreversible.
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5 questions to check what you just read.
0 / 5
- Q1.Reversible:
- Q2.Irreversible:
- Q3.Water ⇌ steam is:
- Q4.Tearing paper is:
- Q5.Switching on a fan then off: