Question
Select two events that represent chemical changes that occur as a candle burns.
A.
Heat and light are produced.
B.
The heat melts the candle wax.
C.
Black smoke rises from the flame.
D.
Wax drips down the side of the candle.
E.
The candle wax turns solid as it cools.
A.
Heat and light are produced.
B.
The heat melts the candle wax.
C.
Black smoke rises from the flame.
D.
Wax drips down the side of the candle.
E.
The candle wax turns solid as it cools.
Answers
GPT-4o mini
The two events that represent chemical changes that occur as a candle burns are:
**A. Heat and light are produced.**
**C. Black smoke rises from the flame.**
Event A indicates the release of energy in the form of heat and light due to combustion, which is a chemical change. Event C refers to the production of black smoke, which consists of unburned carbon particles resulting from incomplete combustion, another indicator of a chemical change.
Events B, D, and E describe physical changes or states of matter rather than chemical changes.
**A. Heat and light are produced.**
**C. Black smoke rises from the flame.**
Event A indicates the release of energy in the form of heat and light due to combustion, which is a chemical change. Event C refers to the production of black smoke, which consists of unburned carbon particles resulting from incomplete combustion, another indicator of a chemical change.
Events B, D, and E describe physical changes or states of matter rather than chemical changes.