Mention different types of phase transitions.

1.	Mention different types of phase transitions.
Answer» The following are the types of phase changes : (1) Fusion : This involves the change of a matter from solid state to liquid state. In this heat is absorbed, hence it is endothermic (ΔH > 0). H₂O_(S) → H₂O_(I) (2) Vaporisation or evaporation : This involves the change of a matter from liquid state to gaseous state. In this heat is absorbed, hence it is endothermic (ΔH > 0). H₂O_(I) → H₂O_(g) (3) Sublimation : This involves the change of matter from solid state directly into gaseous state. In this heat is absorbed, hence it is endothermic (ΔH > 0). Camphor_(g) → Camphor_(g)

Answer»

The following are the types of phase changes :

(1) Fusion : This involves the change of a matter from solid state to liquid state. In this heat is absorbed, hence it is endothermic (ΔH > 0).

H₂O_(S) → H₂O_(I)

(2) Vaporisation or evaporation : This involves the change of a matter from liquid state to gaseous state. In this heat is absorbed, hence it is endothermic (ΔH > 0).

H₂O_(I) → H₂O_(g)

(3) Sublimation : This involves the change of matter from solid state directly into gaseous state. In this heat is absorbed, hence it is endothermic (ΔH > 0).

Camphor_(g) → Camphor_(g)

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