Chapter 2.2, Problem 1RQ

Interpretation Introduction

Interpretation: The term chemical property and two examples of chemical change needs to be explained.

Concept Introduction:A new substance formed in a chemical reaction, the reactant is the starting material and product is last substance. The nature of any substance is explained by their chemical properties and physical properties.

Answer to Problem 1RQ

A chemical property explains how a substance reacts with other substances. The chemical change, in which, the new product is formed and the absorption of energy or the loss of energies are in a different form.For example, formation of aluminum oxide and rust.

Explanation of Solution

Properties that can only be observed through a change in the chemical composition of a substance, called chemical property.

In a chemical change, a new substance is formed and absorption of energy or loss of energy occurs; it is an irreversible change. In chemical changes absorption and evolution of heat take place. The chemical changes are irreversible.

For example:

• A chemical reaction between aluminum and oxygen to form aluminum oxide is a chemical change.
• Iron and oxygen from rust is the example of chemical property.