What is the difference between a chemical and physical change?

There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed. read more

Well, there is a big difference! If you change something physically you still have what you started with. read more

The difference between a chemical change and a physical change lies in how the change affects the composition a substance. A chemical change occurs on the molecular level and produces a new substance. read more

The main difference between ohysical change and chemical change is that physical change is any change that only transforms the substance's physical properties, but chemical change results in change in the chemical structure of the susbtances involved. read more