Question

Hydrochloric acid and sodium hydroxide are mixed together to form salt and water. During the reaction, the temperature of the solution increases. Which of these best explains why this is considered to be a chemical change?

No energy was destroyed.

Heat was given off.

It involved liquids.

New substances formed.

Answer 1

@AkashdeepDeb @warningiflirt

Answer 2

@Zale101 @zepdrix @countonme123 @Compassionate @CGGURUMANJUNATH @creeksider @billybob1 @BlackLai @nincompoop @NoelGreco @NaCl

Answer 3

Heat was given off.

Answer 4

A new substance was formed.

Answer 5

A chemical change takes place only if new stuff with new properties is formed.
Because an energy change can ALSO take place in a physical change.
So the correct answer here should be D) because new stuff is formed.

Answer 6

Other all options can also occur in a physical change! :)
Understood? :)

Answer 7

@AkashdeepDeb yes thank you!