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 Nov 6th 2012, 10:09 PM #1 Junior Member   Join Date: Nov 2012 Posts: 1 thermodynamic's first law Hi there, I have some simple questions in thermodynamics ... Hope I can find the correct answers to them *the quantities: pressure(P) , volume(V) , concentration , are called state function ... is this sentence correct or incorrect ? and why ? I obtained these from a youtube video: in adiabatic process ... ΔE = -w Isochoric ... ΔE = Q Isobaric ... ΔE = Q - w Isothermal ... ΔE = 0 but I didn't get the enthalpy changes in these processes but I think enthalpy would be like this: in adiabatic process ... ΔH = 0 Isochoric ... ΔH = Q ... because in isochoric ΔV=0 Isobaric ... ΔH = Q ... because in Isobaric Pressure is constant Isothermal ... ΔH = Δ(PV) are these correct just like that ? another need of help ... what is ΔE & ΔH for these: *isenthalpic process *isentropic process *Isolated system *open system *close system what is the difference between "Energy content" & "Heat content" ? does it affect numerically the ΔE or the ΔH .. if we say reversible adiabatic process or if we say irreversible adiabatic process ? my regards
 Nov 8th 2013, 03:52 AM #2 Junior Member   Join Date: Nov 2013 Posts: 1 Thanks for info. __________________ http://www.amazon.com/Journaling-Yea.../dp/B0142V40FS Last edited by Kyle689425; Sep 1st 2015 at 01:22 AM.

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