Why is melting butter considered a physical change?

Question

A) The butter changes shape and forms a new substance
B) The butter's molecular structure changes
C) The butter changes form but is still the same substance
D) The butter undergoes a chemical reaction with heat

Answer 1

Melting butter is considered a physical change because:

C) The butter changes form but is still the same substance.

When butter melts, it changes from a solid to a liquid state, but its chemical composition (the molecules and their arrangement) remains the same. Therefore, it is a physical change, not a chemical reaction.