Question

define:
1- Sublimation
2- latent heat of fusion ​

Answer 1

Answer:

1) Solid directly changes into vapour on heating is called sublimation

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Answer 2

Answer:

1. Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... The reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase.

2. The enthalpy of fusion of a substance, also known as (latent) heat of fusion is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a solid to a liquid, at constant pressure.