Jun 13, 2018
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How does the compound isobaric design work?
Te gustariĢa que hablemos de Contradifusion Isobarica? DespueĢs del artiĢculo que salio publicado en InDepth, el intereĢs sobre el tema nos hizo pensar en la posibilidad de un Vivo para dialogar sobre este fenoĢmeno fiĢsico que puede ocurrir si hacemos un cambio inadecuado de mezclas en el ascenso! Buzos TeĢcnicos y no TeĢcnicos les interesa el tema!? Lo hacemos? . . . . #argentinadiving #contradifusionisobarica #isobaric #counterdiffusion #diveteam #technicaldiving (en Argentina Diving - Gear) https://www.instagram.com/p/CAVv2syBYSj/?igshid=y9b1d21f9tm
Isobaric loading explained
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What We Know by Definitions
Isothermal Case
By isothermalĀ we mean that temperature is held constant. The following is true:
āU =Ā āH = 0
āS = R * ln( V2/V1 ) = R * ln( P1/P2Ā )Ā Ā (substitutions with ideal gas law)
q = w = RT * ln( V2/V1 ) = RT * ln( P1/P2Ā )Ā Ā (substitutions with ideal gas law)
w =Ā ā« PdV
P1V1 = P2V2 (substitutions with ideal gas law)
Isobaric Case
By isobaricĀ we mean that pressure is held constant. The following is true:
āU = ā« CvdT
āH = ā« CpdT
āS = ā« CpdT / T
q =Ā āH
w =Ā ā« PdV
Isochoric Case
By isochoricĀ we mean that volume is held constant. The following is true:
āU = ā« CvdT
āH = ā« CpdT
āS = ā« CvdT / T
q =Ā āU
w = 0
Adiabatic Case
By adiabaticĀ we mean that heat flow is held constant. This is also referred to as reversible adiabatic. The following is true
āU = ā« CvdT
āH = ā« CpdT
āS = 0
q = 0
w = - āU
P1(V1^É£) = P2(V2^É£)Ā Ā ( É£ is lowercase greek letter gamma)
É£ = Cp/Cv = (R + Cv) / Cv
Let me know if youād like further explanations on how any of these were derived! The next post will be an example(or more than one? Iām not sure yet) of how to use what we know to solve for different values of interest in a thermodynamic problem. Again, everything we have done thus far is with regard to ideal gases.