Question

is chemical change always irreversible or usually reversible???​

Answer 1

Answer:

With a chemical change, a substance transforms into a different substance. Most chemical changes are irreversible. ... However, there are some chemical changes that are reversible, such as nitrogen dioxide that is chemically changed by heat and then reforms when cooled.

Answer 2

Answer:

With a chemical change, a substance transforms into a different substance. Most chemical changes are irreversible. For example, you cannot unbake a cake or unburn wood. However, there are some chemical changes that are reversible, such as nitrogen dioxide that is chemically changed by heat and then reforms when cooled

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