Why is the reaction of methane with oxygen classified as a chemical change?

Question

A. as there is a temperature change
B. As bubbles are produced
C. As it turns cloudy

Answer 1

The reaction of methane with oxygen is classified as a chemical change primarily because new substances are formed as a result of the reaction. When methane (CH₄) combusts in the presence of oxygen (O₂), it produces carbon dioxide (CO₂) and water (H₂O). This change in chemical composition indicates that a chemical change has occurred.

Among the options you provided, the best answer would be:

A. as there is a temperature change.

While the reaction does produce bubbles (if considering water vapor) and may result in other physical changes, the formation of new products and the accompanying temperature change (exothermic reaction) are key indicators of a chemical change.