Enthelpy of Vaporization vs. Latent heat of vaporization

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SUMMARY

Enthalpy of vaporization and latent heat of vaporization are synonymous terms that describe the heat absorbed during the phase change from liquid to gas, specifically at 100°C for water. The latent heat of vaporization refers to the heat released during the condensation process, transitioning from gas back to liquid at the same temperature. It is essential to distinguish that the term "fusion" pertains to the melting of solids into liquids, while latent heat of condensation is the correct term for the reverse process. Quantitatively, the latent heat of vaporization equals the enthalpy change of vaporization.

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I am having confusion with the difference between these two, or are they synonymous terms?
 
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Woopydalan said:
I am having confusion with the difference between these two, or are they synonymous terms?
They are synonymous terns.
 
Enthalpy of vaporization is the heat , calories/gram, absorbed during phase change from liquid to gas.
For example the heat water at 100 C absorbs going to steam at 100 C
Latent heat of vaporization , usually called latent heat of fusion, is that quantity
of heat released during condensation. The phase change back to a liquid at 100 C from gas at 100 C.
 
morrobay said:
Enthalpy of vaporization is the heat , calories/gram, absorbed during phase change from liquid to gas.
For example the heat water at 100 C absorbs going to steam at 100 C
Latent heat of vaporization , usually called latent heat of fusion, is that quantity
of heat released during condensation. The phase change back to a liquid at 100 C from gas at 100 C.

The term "fusion" is reserved for the melting of a substance from solid to liquid. That's the definition of the word fusion.
 
Chestermiller said:
The term "fusion" is reserved for the melting of a substance from solid to liquid. That's the definition of the word fusion.

I should have said latent heat of condensation then. The key word here is latent, and from my 1A and 1B chemistry classes
it applies when heat previously absorbed during phase change : solid to liquid and
liquid to gas is released in the reverse.
 
Last edited:
morrobay said:
I should have said latent heat of condensation then. The key word here is latent, and from my 1A and 1B chemistry classes
it applies when heat previously absorbed during phase change : solid to liquid and
liquid to gas is released in the reverse.

Except for the words "usually called latent heat of fusion", I like the wording in your previous posting much better, particularly your definition of latent heat of vaporization. Of course, quantitatively, the latent heat of vaporization is exactly equal in magnitude to the enthalpy (change) of vaporization.

Chet
 

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