¿Cuáles son las interacciones y los componentes de una red alimentaria? ¿Cómo cree que afecta la introducción de una nueva especie a una red alimentaria?

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

if you're asking what comes out, it's steam.