Physical changes are changes in which the form of matter is altered but one substance is not transformed into another substance. while Chemical Change is a process where one or more substances are altered into one or more new substances. the basic Difference Between Physical And Chemical Change is that a physical change is reversible and changes have no effects on the chemical bonds. on the other hand, Chemical Change is an irreversible process and they have a direct effect on the chemical bonds.
Difference Between Physical And Chemical Change In Tabular Form
|Physical Change||Chemical Change|
|It s a process in which the material experiences alteration in its physical properties. e.g. shape, size, volume, appearance, and color, etc.||It is a process in which the atoms of one or more substances are combined to form a new substance. E.g. rusting of a metal is an example of chemical change.|
|It is a temporary change.||It is known as a permanent change.|
|E.g. Freezing of water, melting of wax, boiling of water, etc.||E.g. Digestion of food, burning of coal, etc.|
|They do not involve the production of energy.||They involve the production of energy i.e. that can be in the form of heat, light, sound, etc.|
|No absorption or evolution of energy and is a reversible change.||During the reaction, absorption, and evolution of energy and it is an irreversible change.|
|no new material is formed in physical change.||New substances are formed when two or more substances are combined together chemically.|
|Physical change is a short-term alteration.||it is a permanent alteration.|
What is a physical change in chemistry?
In a physical change, a matter changes its form but does not change its chemical identity. Physical changes are the states of matter and energy. No new substance is formed during a physical change, while the matter takes on a different form. The color, size, and shape of the fabric can change. These changes occur when substances mix but do not chemically react.
Examples of Physical Changes
When physically changing, no new chemical substances or compounds are formed. The change in the pure matter’s state is all the physical changes. while the essence of matter does not change. Here are few examples of physical change.
- Crushing a can
- boiling of water
- breaking glass
- melting of ice
- mixing sand with water
- dissolving sugar in water
- shredding paper
- clopping wood
- mixing green and red marbles
- sublimation of dry ice
- Break the bottle
- Crumple sheet of aluminum foil
- Soda freezer bottle
What is a chemical change?
A chemical change occurs when the substance change to form a new substance through a chemical reaction. Chemical changes are usually not easily reversible because the atoms are rearranged in a chemical reaction. Its result is not original when substances combine together because a chemical change produces a new substance. A chemical change is a result of chemical reactions.
The only way to reverse a chemical change is with another chemical reaction. a chemical change takes place at the molecular level. A chemical change forms a substance that didn’t exist before. this may be due to clues of reactions E.g. light, color change, heat, gas formation, smell, or sound.
Examples of Chemical Changes
A new product forms as a result of a chemical change, when atoms react to form new chemical bonds. Examples are:
- Mixing acid and base
- Digestion of food
- Burning tree
- Cooking an egg
- burning of coal
- Baking a cake
How to identify a chemical or physical change?
Look signs for the chemical changes that have occurred in a reaction. chemical reactions absorb heat or can produce gas, odor, color, or sound. There is a physical change if you don’t see any of these signs there. In some processes, it is difficult to tell if a physical or chemical; change has occurred.
A physical change occurs i.e. when you dissolve sugar in water, chemically it remains the same (sucrose molecules) while the shape of the sugar changes. On the other hand, when you dissolve salt in water, NaCl breaks down into ions ( Na+ and Cl–) and a chemical change occurs.
in these cases, the white solid dissolves into pure liquid. in both these cases, you can recover the original material by removing the water while both processes are not the same.
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