Question

When water solidifies to ice then heat
Is a) Liberated b) Absorbed
c) No change
d) Depending on the condition of heat
absorbed or liberated.

SCERT Class 9 Telangana, Physical Science Chapter 1 Matter Around us

Answer 1

When water solidifies to ice then heat is " liberated " 

therefore the correct option is (a)

Answer 2

Dear Student,

◆ Answer - (a)

When water solidifies to ice then heat is liberated.

● Explaination -

• Water molecules contain more energy than that of ice.
• Hence during solidification of water to ice, extra energy of water molecules is liberated to the surrounding.
• Thus, solidification of water is a exothermic reaction.

# Extra information -

• Reactions which heat is released to surrounding are called exothermic reactions.
• Reaction which require heat absorption to proceed are called endothermic reaction.

Thanks dear. Hope this helps you...