How are chemical changes different from physical changes?(1 point) Responses They form new substances. They form new substances. They include shifts in the phase of matter. They include shifts in the phase of matter. They are reversible. They are reversible. They involve heat.
The main difference between chemical changes and physical changes is that chemical changes result in the formation of new substances, while physical changes do not. Chemical changes involve the breaking and forming of new chemical bonds, leading to the creation of different molecules with distinct properties. In contrast, physical changes only involve a change in the physical state or appearance of a substance, such as a change in its shape or phase (solid, liquid, gas) without any alteration in its chemical composition. While both types of changes may involve heat, the involvement of heat is not exclusive to chemical changes.
Chemical changes are different from physical changes because they form new substances. Physical changes, on the other hand, do not form new substances.
Chemical changes are different from physical changes in a few ways. One of the main differences is that chemical changes result in the formation of new substances. This means that the chemical composition of the materials involved is altered, and new substances with different properties are produced.
To determine whether a chemical change has occurred, one can look for the formation of new substances by observing changes in color, odor, or the production of gas. For example, when wood burns, it undergoes a chemical change and transforms into ash, smoke, and gases.
On the other hand, physical changes involve changes in the physical state or arrangement of matter without the formation of new substances. These changes can include shifts in the phase of matter, such as melting, freezing, boiling, or condensing. Physical changes can also be reversible, meaning that the original substance can be obtained again without any alteration in its chemical composition. An example of a physical change is the melting of ice into liquid water. The ice is still composed of water molecules, just in a different physical state.
It is worth noting that both chemical and physical changes can involve heat, although it is not a defining characteristic. Heat can facilitate both types of changes, but it is not always necessary for them to occur.