Is hydrogen and oxygen gas combining to form #H_2O# a chemical or physical change?

1 Answer
anor277
Apr 14, 2017

This is manifestly a chemical change............

Explanation:

Chemical change is characterized by the making and breaking of strong chemical bonds, and the formation of new substances.......

#H_2 + 1/2O_2 rarr H_2O#

And this representation certainly depicts the breaking STRONG #H-H# and #O=O# bonds, and the making of stronger #H-O# bonds in the water molecule.

And so, this clearly is an example of chemical change.

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