Entropy and free energy, Chemistry

 

Entropy (S) is a molecular 'disorder', or more precisely 'the number of microscopic arrangements of energy possible in a macroscopic sample'. Entropy depends strongly on the state and increases with rise in temperature.

Entropy changes (ΔS) are positive for reactions that generate gas molecules. The Second Law of Thermodynamics defines that the total entropy always increases in a spontaneous process, and reaches a maximum value at equilibrium. To apply this to chemical reactions it is necessary to include entropy changes in the surroundings caused by heat output or input. Both external and internal changes are taken account of by defining the Gibbs free energy change (ΔG): for a reaction performing at constant temperature.

 

 

 

2233_Untitled.png

Posted Date: 7/21/2012 8:47:35 AM | Location : United States







Related Discussions:- Entropy and free energy, Assignment Help, Ask Question on Entropy and free energy, Get Answer, Expert's Help, Entropy and free energy Discussions

Write discussion on Entropy and free energy
Your posts are moderated
Related Questions
Why lithium and beryllium markedly differ from other members of their respective groups?

Laws of mass action were proposed by Gulberg and Waage. The rate of chemical reaction is directly proportional to the product of the active masses of the reactants (molar concentra

what are the acid refractory and its application and examples?

Mixtures can always be separated by physical means. Describe how you would separate the components in a mixture of table salt and sand.

mass of atom

Concentration of electrons in the conduction band At equilibrium, there is no net current flowing across p-n junction. Concentration of electrons in the conduction band in cond

Are there any disadvatages of mass spectrometry

alkali metals belong to s-block in the periodic table.why?


how much percentage alcoholic acidity content in wwheat flour sample