Standard State Enthalpy of 63Sn-37Pb

    • john.x.juveli

      Hi all,

      I am attempting to do a PCM for melting and solidifcation of a eutectic tin lead solder, and am curious as to my material property accuracy.

      My understanding is that the standard state enthalpy is your molecular weight [kg/kmol] multiplied by the latent heat [J/kg] to get the appropriate enthalpy [J/kgmol]. Is this accurate here?

      Additionally, I have the MW of 63Sn-37Pb as ~320 kg/kmol by simply adding the two atomic weights of both Tin (118.71 ) and Lead (207.2). Is this a good ballpark estimation? Am I missing anything critical here?


    • 1shan
      Ansys Employee
      Chemistry is not my strong point but from whatever I remember, I think you need to multiply the mole fraction with the respective molecular weight and then add for each component. So 0.63*118 + 0.37*207 = 150 should be the average molar mass of the alloy.
      Regards Ishan.
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