The images show two unrelated events occurring at separate times.

Event 1: A beaker pours a clear liquid into a second beaker, also full of clear liquid, creating an orange liquid. A glass holds clear liquid, with some areas of dark blue liquid surrounded by lighter blue liquid.

Which event is most likely an example of a chemical reaction?

Event 1 because there is a release of heat and light.

Event 2 because the blue color mixes throughout the liquid.

Event 2 because the temperature is dropping in the liquid.

Event 1 because there is a color change.

Event 1 is an example of a chemical reaction.

Explanation:

Whenever there is a chemical reaction, we can find that by means of a color change, formation of any gas, vapors, bubbles or any color or colorless precipitation, or by means of heat generation.

In the event 1 there is only a clear liquid in the beaker again it is added to a clear liquid in another beaker, forming an orange colored liquid , which shows that there is an occurrence of some chemical reaction.

So Event 1 is most likely an example of a chemical reaction.

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water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.