Reggie and Charlotte are baking oatmeal cookies. They dip the baked cookies in melted chocolate. The chocolate cools to form a hardened coating. Reggie argues the entire chocolate-covered cookie has undergone a chemical change. Charlotte disagrees, saying only the original oatmeal cookie has undergone a chemical change, not the chocolate coating.

Who is correct?

A: Reggie, because baking and melting cause bonds to be broken, leading to a chemical change.

B: Reggie, because objects that are heated always undergo chemical changes.

C: Charlotte, because melting objects only sometimes cause a chemical change.

D: Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.

Question

Physics

Noemi Thornton

4 December, 17:43

Reggie and Charlotte are baking oatmeal cookies. They dip the baked cookies in melted chocolate. The chocolate cools to form a hardened coating. Reggie argues the entire chocolate-covered cookie has undergone a chemical change. Charlotte disagrees, saying only the original oatmeal cookie has undergone a chemical change, not the chocolate coating.

Who is correct?

A: Reggie, because baking and melting cause bonds to be broken, leading to a chemical change.

B: Reggie, because objects that are heated always undergo chemical changes.

C: Charlotte, because melting objects only sometimes cause a chemical change.

D: Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.

+1

Answers (2)

Know the Answer?

Marcos Shields · Answer 1

First B) is wrong cuse it uses always in the question not always would heat change things chemical

A) is just the posit of what melting would do.

D) it is correct

Raindrop · Answer 2

The answer is D. When you melt something, it only changes its physical change.