Which of the following demonstrates a chemical change? point)

vaporizing sugar and water mixing to create sugar water (Fe) reacting to water (H 2 O)) and oxygen() to form iron oxide (F*e_{2}*O_{3}) steam.condensing on a mirror

1 answer

The following options demonstrate a chemical change:

1) (Fe) reacting to water (H2O) and oxygen (O2) to form iron oxide (Fe2O3). This is a chemical reaction where the iron reacts with water and oxygen to form a different compound, iron oxide.

2) Steam condensing on a mirror. This is a physical change where water vapor (steam) turns into liquid water when it comes into contact with a cooler surface (the mirror).