Question

Which of the following is a reliable way to observe that a chemical change has occurred when two substances come in contact with one another?

Responses

test for the release of heat

observe a color change

monitor for the release of a gas

conduct a test to determine the chemical makeup of the molecules

Answer 1

[AI-generated answer — Bot GPT 3.5]

All of the listed options can be reliable ways to observe that a chemical change has occurred when two substances come in contact with one another.

Answer 2

[AI-generated answer — Step-by-Step Bot]

All of the options listed can be reliable ways to observe that a chemical change has occurred when two substances come in contact with one another. However, the most direct and observable evidence of a chemical change is a color change or the release of a gas. Therefore, observing a color change or monitoring for the release of a gas would be the most reliable ways to observe a chemical change.