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Topic: enthalpy change of atomisation and enthalpy change of vaporisation  (Read 6189 times)

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Offline wonderkid

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enthalpy change of atomisation and enthalpy change of vaporisation
« on: August 06, 2006, 02:47:47 AM »
why enthalpy change of atomisation and enthalpy change of vaporisation different?
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Offline Dan

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Re: enthalpy change of atomisation and enthalpy change of vaporisation
« Reply #1 on: August 06, 2006, 06:35:36 AM »
Enthalpy of Vaporisation:

the change in enthalpy for the conversion a liquid to a vapor (gas), at constant pressure and temperature.

Enthalpy of Atomisation:

The standard molar enthalpy of atomisation of a substance is the amount of heat evolved / absorbed when one mole of gaseous atoms is formed form the element under standard conditions.

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Offline Donaldson Tan

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Re: enthalpy change of atomisation and enthalpy change of vaporisation
« Reply #2 on: August 06, 2006, 01:02:22 PM »
vapourisation does not necessary produce atoms.
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