EVERYDAY SCIENCE

Detailed explanation-1: -When something is boiling, its phase changes from the liquid phase to the gas phase; no chemical bonds are broken; molecules become farther removed from each other; and the transition qualifies as a physical change.

Detailed explanation-2: -Research shows that students frequently use the term chemical change to describe changes in physical state. Freezing and boiling are considered to be examples of chemical reactions.

Detailed explanation-3: -Boiling is a physical change and molecules are not chemically altered during the process.

Detailed explanation-4: -Boiling water is a physical change because the gaseous water produced is chemically identical to the liquid water i.e both of them have the same molecular structure of the water.

Detailed explanation-5: -Melting an ice cube. Boiling water. Mixing sand and water. Breaking a glass. Dissolving sugar and water. Sublimation of dry ice. Crumpling a paper bag.