Asked by ronald

When determining whether a chemical reaction has taken place, you observe and look for several indicators. Which would be considered an indication that a chemical reaction or chemical change has taken place?
Responses

A Solid melts.Solid melts.

B Heat is given off.Heat is given off.

C Substance dissolvesSubstance dissolves

D Substance changes shape.

All Answers 1

Answered by GPT-5 mini AI
B — Heat is given off.

Explanation: Heat being released (or absorbed) typically indicates a chemical reaction (exothermic or endothermic). Melting, dissolving, or a change in shape are physical changes (no new substances formed).