Physics Help Forum Enthalpy and heat advection
 User Name Remember Me? Password

 Thermodynamics and Fluid Mechanics Thermodynamics and Fluid Mechanics Physics Help Forum

Oct 9th 2017, 12:23 PM   #1
Senior Member

Join Date: Apr 2015
Location: Somerset, England
Posts: 613
 My problem is that enthalpy is a differential property as I understand it, given up to a constant h0 by dh=CpdT, i.e., h=h0+∫CpdT
Not exactly a differential property.

It's just that there is an arbitrary baseline, which is h0 in your equations.

Enthalpy is another name for 'heat content', which is the amount of heat energy you have to put in to assemble the substance from its components plus the heat energy you need to bring to temperature T.
The latter is the specific heat times the temperature change from whatever base temperature you are working.

It is usual to take h0 as the energy of assembly of the molecules from its component atoms minus any energy you get back by forming the bonds.

 Tags advection, enthalpy, heat

 Thread Tools Display Modes Linear Mode

 Similar Physics Forum Discussions Thread Thread Starter Forum Replies Last Post simina11 Thermodynamics and Fluid Mechanics 2 Feb 22nd 2015 05:22 PM Gav33 Advanced Thermodynamics 2 May 21st 2014 03:01 PM Wobzter Advanced Thermodynamics 2 Jul 4th 2012 08:02 AM rimmer Thermodynamics and Fluid Mechanics 1 Mar 9th 2010 03:54 AM Natla Energy and Work 0 Nov 6th 2008 04:19 PM