Question

which statement most accurately describes what happens when a bar of chocolate melts? a. a chemical change takes place that causes molecules to move slower. b. a physical change takes place that causes molecules to move faster. c. a physical change takes place that causes molecules to move slower. d. a chemical change takes place that causes molecules to move faster.

Explanation:

Melting is a physical change where heat is added. Adding heat increases the kinetic - energy of molecules, making them move faster. There is no chemical reaction occurring during the melting of chocolate as the chemical composition of chocolate remains the same.

Answer:

B. A physical change takes place that causes molecules to move faster.