Question

Can I have an example of both a chemical and physical change happening at the same time. It can’t be a burning candle, burning wood, or food chewing and digestion.

Answer 1

Quick lime is calcium oxide. It is an example of physical and chemical change.

Step-by-step explanation:

• The physical change is water turning into steam while heating.
• It’s a chemical change. Quicklime is calcium oxide (CaO). When water is added to the calcium oxide, it is converted to calcium hydroxide in the reaction:

CaO + H₂O -> Ca(OH)₂

• In geology when earthen materials are exposed to water and are weakened or decomposed.
• This process is referred to as slaking. Thus, calcium hydroxide resulting from the treatment of quicklime reacting with water form slaked lime.