{
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      "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy", 
      "max_abs_error": 327.3890833815358, 
      "max_abs_error_units": "J/mol", 
      "type": "rational_polynomial"
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      "description": "rho' = rhoc*(1+sum(n_i*theta^t_i))", 
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      "description": "rho'' = rhoc*exp(Tc/T*sum(n_i*theta^t_i))", 
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      "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy", 
      "max_abs_error": 1.049126905412665, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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      "type": "rational_polynomial"
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    "surface_tension": {
      "BibTeX": "Mulero-JPCRD-2012", 
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
      "n": [
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  "CAS": "75-71-8", 
  "ENVIRONMENTAL": {
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    "FH": 1, 
    "GWP100": 10900.0, 
    "GWP20": 11000.0, 
    "GWP500": 5200.0, 
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    "Name": "R12", 
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      "Ttriple": 116.099, 
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          "type": "ResidualHelmholtzPower"
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      "gas_constant": 8.314471, 
      "gas_constant_units": "J/mol/K", 
      "molar_mass": 0.120913, 
      "molar_mass_units": "kg/mol", 
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      "pseudo_pure": false
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  "NAME": "R12", 
  "REFPROP_NAME": "R12", 
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    "triple_vapor": {
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      "rhomolar": 0.00025126911645679634, 
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}