Question

Similarities and differences between physical changes and chemical change ​

Answer 1

In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. Although we call them physical "reactions," no reaction is actually occurring

Answer 2

Similarities between physical and chemical changes are:

• In a physical change, only the physical properties such as shape, size, color, etc. are changed.
• In a chemical change, the chemical properties are changed such as basicity, acidity, etc.

Differences between Physical and Chemical changes are:

• Physical change is a temporary change while chemical change is a permanent change.
• In a physical change, no new substances are formed while in a chemical change new substances are formed.
• Physical changes are generally reversible changes while chemical changes are irreversible changes.
• Physical changes do not involve energy while chemical changes involve energy to form new compounds.
• Examples of physical changes are melting of ice, making chapati from the dough, etc.
• Examples of chemical changes are the burning of coal, rusting of iron, etc.