Question

Two compounds are mixed and light is emitted, the color changes, and heat is liberated.

Which activity has occurred?

A. Chemical reaction
B. Chemical mixture
C. Chemical nucleus exchange
D. Chemical compromise ​

Answer 1

The mixing of two compounds that results in light emission, a color change, and the liberation of heat indicates that a Chemical Reaction has taken place.

Step-by-step explanation:

When two compounds are mixed, and as a result, light is emitted, the color changes, and heat is liberated, the activity that has occurred is a Chemical Reaction. These are classical signs that chemical bonds have been broken and formed, resulting in new substances with different properties than the original compounds. This change is not merely physical, as the substances' fundamental composition has been altered, something that a simple mixture does not accomplish. For example, when ammonium dichromate is heated, it decomposes in a reaction that produces heat, light, and gas, and the resultant chromium(III) oxide has very different properties from the original substance.

Answer 2

A. Chemical reaction

Step-by-step explanation:

This is a chemical reaction. A chemical reaction involves the combination of two or more compounds. Such reactions involves the loss and gain or sharing of electrons. For reactions to occur, chemical bonds have to be re-arranged.

The mechanisms of a chemical reaction leads to different effects being produced.

In some chemical reaction, heat is given off and we say it is exothermic. Some absorbs heat. Some reactions liberates gases.

Sometimes in a chemical reaction, light is given off and we say it is chemiluminescent. This is as a result of electrons transiting from one energy level to another.

Reactions that involves transition elements are usually colourful. They are accompanied by a plethora of color changes.

All of these typifies the process of chemical reaction.