Question

The melting of wax is a physical change, yet the burning of wax is a chemical change. what is the essential difference between the physical change and the chemical change of wax in a burning candle?
A. The burning of wax forms new compounds, while the melting of wax does not.
B. A higher temperature is needed to burn wax than to melt wax.
C. Melted wax can be separated into other substances, while solid wax cannot.
D. Melted wax is a different phase of matter than solid wax.

Answer 1

C. Melted wax can be separated into other substance, which solid wax cannot.