Question

question 8 of 20
points: 2
coal burning in a steam engine is an example of...
a. chemical change
b. physical change

Explanation:

A chemical change involves a transformation that results in the formation of new substances. When coal burns, it reacts with oxygen to produce carbon dioxide, water vapor, and other substances. This is a chemical reaction. A physical change, on the other hand, does not involve the formation of new substances (e.g., melting ice). Since coal burning forms new substances, it is a chemical change.

Answer:

A. chemical change