Chemical Change Lab Report

In this lab, we were given three experiments. We had to go through steps and make observations for each, but in the end we had to decide whether the experiment had a chemical or physical change. A physical change can alter the state of matter, but not the substances identity. A chemical change transforms a substance from one identity to another. It is important to identify the difference between physical and chemical changes in any lab because you want to know the process of what is going on.
The first experiment was the water jug explosion. First we took a five gallon jug and coated it with ethanol, making sure to swirl the bottle around to coat. Then with the lights off, we placed the jug on the table and used a kitchen lighter to light it. In the dark, the flame was almost suspended in the bottle, burning the chemical inside. When we turned the lights back on, we saw that the only thing left in the bottle was water. The jug was warm to the touch and the air smelled like gasoline. I conclude that this experiment had a chemical reaction because the flame mixed with the ethanol to make a new substance, which was water.
For the next experiment we worked with an acetyle torch. The bottles that were hooked up to the torch were filled with oxygen and settling. First we
First, I used the striker to ignite the flame for the bunsen burner. It took a few tries to get a good flame. Once I had a good flame, I measured the mass of the copper wire to be about 1.897g. Then, using tongs, I held the copper wire over the top portion of the bunsen burner flame. The coating of the copper wire came off and it warped it a little, but nothing super drastic happened. After it had cooled down, the measured mass came to be around 1.898g. I conclude this experiment to be a physical change because the identity of the copper didn’t change, the coating of the metal just came