Standard entropy change of vaporization
Encyclopedia : S : ST : STA : Standard entropy change of vaporization
The standard entropy change of vaporization is the increase in entropy when vaporizing a substance. This is always positive since the degree of disorder increases in the transition from an organized crystalline solid or a slightly less organized liquid to the extremely disorganized structure of a gas. It is denoted as ΔSovap and normally expressed in J/mol·K.
A natural process such as a phase change will occur when the associated change in the Gibbs free energy is negative. It follows that the standard entropy change of vaporization is related to the boiling point and the standard enthalpy change of vaporization:
- [ \Delta H_ = T_ \times \Delta S_]
See also
From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.