Question

give example of physical change which occurs by the action of heat

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Answer 1

Answer:

Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

Answer 2

Examples of a physical change are:-

• Breaking/Crushing of any Object
• Expansion of Metal on Heating
• Dissolving Sugar or Salt (Solute) in Water (Solvent) (as a result, a solution is formed)
• Solidification of Molten Metal on Cooling
• Shredding Paper

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What is physical change of matter?

A physical change is a change in the physical form or physical property of matter, with the chemical identity remaining the same.

A physical change is a type of change in which the form of matter (substance) is altered but one substance is not transformed into another different substance.

For example,

(a) if we carve a piece of wood into a baseball bat, it will still burn in a fire and float on water. It remains wood, so it is a physical change.

(b) Crushing a can: after crushing can changes its shape, size but it still remains Aluminum so it is a physical change.

Burning of wood is a chemical change because of burning wood changes to totally different new products (ash, smoke, and carbon dioxide).

Here is a video of a lab with a number of examples of both chemical and physical changes.