Is sublimation a chemical change?

1 Answer
Oct 20, 2016


No. It is a physical change. See explanation.


A chemical change (reaction) is a process where one or more substances react to create other substances. Example:

#NaOH+HCl -> NaCl+H_2O#

In this reaction from 2 substances (acid and a hydroxide) other 2 substances (salt and water) are created.

If a substance (for example water) sublimates NO new substances are formed. Only the state of matter changes. A solid (ice) becomes a gas (vapour) but it is still the same chemical substance - water (#H_2O#)