Both the physical and chemical properites of a substance can change when a substance undergoes a chemical reaction. When a log is burned, a chemical reaction occurs. The log is transformed into ash, water vapor, and carbon dioxide.

Question

The log is flammable, or able to be burned, in its original form. Once the log is burned, however, the ashes that are produced are no longer flammable. The volume of the log also changes when it changes into ash and gas.

Volume is a _______ property. Flammability is a _______ property.
A.
physical; chemical
B.
physical; physical
C.
chemical; physical
D.
chemical; chemical

Answer 1

The correct answer is:

A. physical; chemical

Volume is a physical property because it refers to the amount of space that a substance occupies, which can change without altering the chemical identity of the substance. Flammability is a chemical property because it describes the ability of a substance to undergo a chemical change (burning) when exposed to heat or flames.