The boiling of water is a
A)physical change because the water merely disappears.
B)chemical change because heat is needed for the process to occur.
C)physical change because the gaseous water is chemically the same as the liquid.
D)chemical and physical change.
E)chemical change because a gas (steam)is given off.

Question

Quizplus · Accepted Answer

The boiling of water is a physical change because it involves a change in the state of matter from liquid to gas, but the chemical composition of water remains the same. The water molecules remain the same, and only the space between them increases. The boiling process does not involve any chemical reaction that changes the identity of water. Therefore, option C is the best choice.

The Boiling of Water Is a