{
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        -8.845355073516431e-15
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        7.136811856404234e-14
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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", 
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      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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      "max_abs_error": 1.0938876231927008, 
      "max_abs_error_units": "J/mol/K", 
      "type": "rational_polynomial"
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      "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", 
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  "CAS": "75-69-4", 
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    "FH": 1, 
    "GWP100": 4750.0, 
    "GWP20": 6730.0, 
    "GWP500": 1620.0, 
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      "molar_mass_units": "kg/mol", 
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  "NAME": "R11", 
  "REFPROP_NAME": "R11", 
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    "triple_vapor": {
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      "rhomolar": 0.004813343717940787, 
      "rhomolar_units": "mol/m^3"
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}