Question

Which of these are Irreversible change
a. Melting of chocolate
b. Condensation of stem
c. Breaking of glass
d. Boiling of water

Answer 1

Answer: breaking of glass

Explanation:

Because the glass is sensitive, it breaks and cannot be brought to its same shape.

Only chemically treated,this can happen.

If the Q says that FIND THE IRREVERSIBLE CHEMICAL CHANGE

Then only will this answer not be correct

Here it says only about irreversible.

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Answer 2

Breaking of glass is the irreversible process.

Explanation:

• The broken glass is an example of an irreversible process.
• We give a force to the glass is the mechanical energy, then it converted to heat. So the glass was break.
• A reversible process is one in which there is no change in entropy and the system and the surroundings can be returned to the initial state.
• Breaking glass is an example of a physical change because if you break it, it is still glass.
• It didn't change to another substance.

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1.20th examples of reversible and irreversible changes

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