Will mark brainliest! Calculate the final temperature after 15 joules of heat energy is added to 7.3 g of water at 3.2ºC.

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.

well in order to answer this question you have to provide more information < 3

explanation: no but i do not usually comment

i think it is true since you can test the answer and can use observations to complete it.