Label each as a physical or chemical change & explain your reasoning.

1st chemical equation → Chemical change

2nd chemical equation → Physical change

3rd chemical equation → Physical change

4th chemical equation → Chemical change

Explanation:

Chemical change has to the do with the creation of an entirely new product or  substance. When two reactants react and form entirely new product(s), we say that a chemical change has occurred.

While a physical change does not create an entirely new substance or product; it can only change to a new form or state.

From the given equations, we discover that in the first equation, propane reacted with oxygen to give carbon (II) oxide and water (entirely new products) while in the second chemical equation, ethanol is a liquid (at room temperature) but later changes its state to gas (physical change).

The above answer is correct.