Would you expect a chemical change to be always accompanied by a physical change?Pls. Explain
I would expect that to be the usual but I'm sure if we thought about it we could find a few examples where that isn't true. The reason I would expect that is that if the chemical composition changes, as in a chemical change, usually the material looks and feels differently, too.
Tare kyo tim tim mate hai.hindi
A chemical change and a physical change are two different types of changes that can occur in matter.
A chemical change involves a rearrangement of atoms or molecules at the molecular level, resulting in the formation of new substances with different properties. During a chemical change, the bonds between atoms are broken and new bonds are formed, changing the chemical composition of the material. Examples of chemical changes include burning, rusting, and digestion.
On the other hand, a physical change refers to a change that does not involve a change in the chemical composition of the substance. It typically involves a change in the physical state, shape, or form of the material. Examples of physical changes include melting, freezing, dissolving, and changes in size or volume.
While chemical changes can sometimes be accompanied by physical changes, it is not always the case. Some chemical changes may occur without any noticeable physical changes. For example, when hydrogen gas reacts with oxygen gas to form water, the chemical change is the formation of water molecules. However, since the reactant and product are all gases, there may not be any significant physical changes observed.
On the other hand, there are instances where chemical changes are accompanied by noticeable physical changes. For example, when iron reacts with oxygen in the presence of moisture, it forms rust. In this case, the chemical change is the formation of iron oxide (rust), while the physical change is the visible change in color and texture of the iron surface.
In summary, while chemical changes and physical changes are distinct, they can sometimes occur together, but it is not always the case. The occurrence of physical changes alongside a chemical change largely depends on the nature of the substances involved and the conditions under which the change occurs.