What do we call a Chemical change that cannot be undone?

Answer 1

To Answer your question, it can be reversed, but it not so easy.

Look at what I found in an article:

"Physical changes, like the melting of a solid to a liquid can be reversed easily - just refreeze it.

Chemical changes, like the blackening of toast when burnt, are not so easy to reverse."

Hope I Helped

-- Nick

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Please check out my YouTube account, I am going to have some Chemistry experiments and explanations up in a few months! : http:/www.youtube.com/truetechgeek

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Answer 2

A chemical change that cannot be undone is called an irreversible chemical change. This means that the substances involved undergo a permanent change in their chemical composition and cannot be returned to their original state through physical means.

Answer 3

When you bake a cake the cake goes from liquid to solid changing chemically. Now try to imagine unbaking that same cake. It's hard to reverse a chemical change because a new substance is formed in that change

Answer 4

A chemical change is a change that cannot be undone. A chemical change cannot be reversed because a new substance will be formed.

Answer 5

well.... it is called "irriversible process".... that's what my friend says....if you wish you can call it "unidirectional process" or a "chemical change".

Answer 6

It is called an irreversible change. that's a big word so be careful.

Answer 7

An irreversible chemical change is a chemical change that cannot be put back to its orginal state

Answer 8

Chemical change.