Enthalpy, Chemistry

Enthalpy, H, is defined by the relationship H=U+pV. The enthalpy change, ΔH, for finite changes at constant pressure is given by the expression ΔH = ΔU+pΔV, so making the enthalpy change for a process equals to the heat exchange in a system at constant pressure. For a chemical system which releases or absorbs a gas at constant pressure, the enthalpy change is related to the internal energy change by ΔH=ΔU+Δn.RT, where Δn is the molar change in gaseous component some other process occurring.

The enthalpy, H, is defined by the expression; H=U+pV, Hence for a finite change at constant pressure:

ΔH=ΔU+ pexΔV

 

 

Posted Date: 7/20/2012 3:24:08 AM | Location : United States







Related Discussions:- Enthalpy, Assignment Help, Ask Question on Enthalpy, Get Answer, Expert's Help, Enthalpy Discussions

Write discussion on Enthalpy
Your posts are moderated
Related Questions
Q. Illustrate Activity Series for Metals? Ans. An activity series is a series that orders substances on the basis of their reactivity. The following diagram is the activit

Q. What is Line graphs? The points on a line graph symbolize the intersection of data for two variables. The independent variable is contrived on the horizontal axis. The depen

Q. Crystal Field Splitting in Tetrahedral Field? A tetrahedron can be viewed as a part of cube where the metal ion occupies the centre of the cube and the four ligands are plac

Addition of Grignard reagents: Grignard reagents react along with carbonyl compounds to offer alcohols. Nature of alcohol lies on the nature of carbonyl compound. Addition o


Fe(atomic number = 26) atom has the electronic arrangement: (1) 2, 8,  8, 8         (2) 2, 8, 16        (3) 2, 8,14, 2             (4) 2, 8, 12, 4 Ans:  2, 8,14, 2

Q. What are the uses of Tellurium? Tellurium is used primarily as an additive to steel to increase its ductility. It is also used as an additive to some catalysts, used in cra

how can electromigration be used as property for separaton??

Benzene is a very symmetrical compound Benzene is a very symmetrical compound. The carbon framework is essentially a planar hexagon. Because of its resonance structures, all car

WHAT IS USE OF ION PAIR REAGENTS? The chemical substances that pair each other, to produces complexes. These can use for stabilization of one of the molecule that is more active