Chapter 2.2, Problem 3RQ

Interpretation Introduction

Interpretation: This is to be explained that boiling of water is a physical change if water changes from a liquid to a gas form.

Concept Introduction: The nature of any substance is explained by their chemical properties and physical properties. A physical property describes the physical changes of a substance. Physical change is a temporary change; it is a reversible change. For example, color, mass, volume, etc.

Answer to Problem 3RQ

Any change of state is a physical change. So, boiling of water is a physical change if water changes from a liquid to a gas.

Explanation of Solution

In any changes if the composition remains the same then it is an example of physical change. The water boils atchange into gaseous state. Water changes into vapors is the example of phase transfer. The change in the state of matter is the example of physical changes, the ratio of the molecules remains constant, and no new atoms will be generated. So, it is considered as a physical change.