Does a lit candle provide an example of chemical change?

1 Answer
Jul 4, 2017

Answer:

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

Explanation:

So when we light a candle, typically we combust paraffin, #C_31H_64#, an alkane. It may be that we combust more volatile alkanes that are entrained in the wax....

The complete combustion reaction of any alkane is given by.....

#"Alkane + dioxygen "rarr" carbon dioxide and water"#

The combustion of candle wax would never be complete; there would be incomplete combustion to give #C#, and (small quantities of) #CO#.

And thus burning a candle gives 2 new substances, and breaks strong #C-H# (and some #C-C#) bonds.......This is chemical change by definition.