{ "ALIASES": [ "Isobutene", "ISOBUTENE" ], "ANCILLARIES": { "hL": { "A": [ -59577.62487386442, 163.6571214511211, 0.886839155057997, -0.007906002882825926, 3.2646612162263154e-05, -7.845234271900006e-08, 1.0170505805816445e-10, -5.582610022579216e-14 ], "B": [ 1, -0.002369841132302771 ], "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy", "max_abs_error": 335.93487258926325, "max_abs_error_units": "J/mol", "type": "rational_polynomial" }, "hLV": { "A": [ 30687.47076740751, 35.544956057129646, -2.3778730530307666, 0.018903651724156142, -8.039063183610903e-05, 1.9569856257935522e-07, -2.573065051625343e-10, 1.4294964951327256e-13 ], "B": [ 1, -0.002365753812449636 ], "_note": "coefficients are in increasing order; input in K, output in J/mol; value is enthalpy minus hs_anchor enthalpy", "max_abs_error": 693.1250085214399, "max_abs_error_units": "J/mol", "type": "rational_polynomial" }, "pL": { "T_r": 418.09, "Tmax": 418.08999999999907, "Tmin": 132.4, "description": "p' = pc*exp(Tc/T*sum(n_i*theta^t_i))", "max_abserror_percentage": 0.14739891561160734, "n": [ 0.01737687722206489, -6.134166125080951, -3.853515831640818, 8.384924413254762, -243.10740943312803, 365.4747247586171 ], "reducing_value": 4009800.0, "t": [ 0.354, 0.969, 4.231, 10.316, 16.968, 18.914 ], "type": "pL", "using_tau_r": true }, "pV": { "T_r": 418.09, "Tmax": 418.08999999999907, "Tmin": 132.4, "description": "p'' = pc*exp(Tc/T*sum(n_i*theta^t_i))", "max_abserror_percentage": 0.14741018682782325, "n": [ -76.08135715558664, 397.01813873870134, -453.7794701448892, 150.79295360094682, -27.032450330527833, -1.1837914833355219 ], "reducing_value": 4009800.0, "t": [ 1.284, 1.548, 1.685, 2.003, 2.638, 10.608 ], "type": "pV", "using_tau_r": true }, "rhoL": { "T_r": 418.09, "Tmax": 418.08999999999907, "Tmin": 132.4, "description": "rho' = rhoc*(1+sum(n_i*theta^t_i))", "max_abserror_percentage": 0.6248238395114569, "n": [ 3.836064588981606, -8.505454480687774, 12.985006905703951, -10.011005004151073, 5.376836540123832, -10.94925598220989 ], "reducing_value": 4170.0, "t": [ 0.444, 0.979, 1.37, 2.24, 3.344, 13.946 ], "type": "rhoLnoexp", "using_tau_r": false }, "rhoV": { "T_r": 418.09, "Tmax": 418.08999999999907, "Tmin": 132.4, "description": "rho'' = rhoc*exp(Tc/T*sum(n_i*theta^t_i))", "max_abserror_percentage": 0.35084693470349704, "n": [ -8.729642476739642, 6.811506526700638, -6.411697069038467, 5.7983193722867306, -6.559199615514519, -12.258975766186447 ], "reducing_value": 4170.0, "t": [ 0.507, 0.607, 1.205, 1.898, 3.194, 18.774 ], "type": "rhoV", "using_tau_r": true }, "sL": { "A": [ -360.68775668701494, 3.394099905361867, -0.018442856026193572, 7.098426945660611e-05, -1.7959215978097404e-07, 2.758626537811176e-10, -2.3062425929339646e-13, 7.735468069271207e-17 ], "B": [ 1, -0.002368179601779425 ], "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy", "max_abs_error": 0.8419554834168501, "max_abs_error_units": "J/mol/K", "type": "rational_polynomial" }, "sLV": { "A": [ 1090.319217014752, -17.872421523263306, 0.14621096151501756, -0.000720305663491704, 2.2120106278089367e-06, -4.149705664869734e-09, 4.355888799666372e-12, -1.959397600184316e-15 ], "B": [ 1, -0.0023468764841105736 ], "_note": "coefficients are in increasing order; input in K, output in J/mol/K; value is entropy minus hs_anchor entropy", "max_abs_error": 2.1962787503170573, "max_abs_error_units": "J/mol/K", "type": "rational_polynomial" }, "surface_tension": { "BibTeX": "Mulero-JPCRD-2012", "Tc": 418.09, "a": [ 0.0545 ], "description": "sigma = sum(a_i*(1-T/Tc)^n_i)", "n": [ 1.23 ] } }, "CAS": "115-11-7", "ENVIRONMENTAL": { "ASHRAE34": "UNKNOWN", "FH": 4, "GWP100": -1.0, "GWP20": -1.0, "GWP500": -1.0, "HH": 1, "Name": "Isobutene", "ODP": -1.0, "PH": 2 }, "EOS": [ { "BibTeX_CP0": "", "BibTeX_EOS": "Lemmon-FPE-2005", "STATES": { "hs_anchor": { "T": 459.899, "T_units": "K", "hmolar": 33425.002072943826, "hmolar_units": "J/mol", "p": 6480840.914100936, "p_units": "Pa", "rhomolar": 3753.0, "rhomolar_units": "mol/m^3", "smolar": 88.9684754307369, "smolar_units": "J/mol/K" }, "reducing": { "T": 418.09, "T_units": "K", "p": 4009800, "p_units": "Pa", "rhomolar": 4170, "rhomolar_units": "mol/m^3" }, "sat_min_liquid": { "T": 132.4, "T_units": "K", "p": 0.6761899069455894, "p_units": "Pa", "rhomolar": 13666.751920875635, "rhomolar_units": "mol/m^3" }, "sat_min_vapor": { "T": 132.4, "T_units": "K", "p": 0.6761899732705737, "p_units": "Pa", "rhomolar": 0.0006142550272151939, "rhomolar_units": "mol/m^3" } }, "T_max": 525, "T_max_units": "K", "Ttriple": 132.4, "Ttriple_units": "K", "accentric": 0.1925934521621, "accentric_units": "-", "alpha0": [ { "a1": -0.12737888, "a2": 2.3125128, "type": "IdealGasHelmholtzLead" }, { "a": 3, "type": "IdealGasHelmholtzLogTau" }, { "n": [ 4.8924, 7.832, 7.2867, 8.7293 ], "t": [ 0.9543399746466072, 3.037623478198474, 4.795618168336961, 9.60797914324667 ], "type": "IdealGasHelmholtzPlanckEinstein" } ], "alphar": [ { "d": [ 1, 1, 1, 2, 3, 7, 2, 5, 1, 4, 3, 4 ], "l": [ 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 3, 3 ], "n": [ 0.77111, -2.7971, 1.0118, 0.02073, 0.085086, 0.00021968, 0.20633, -0.078843, -0.23726, -0.080211, -0.027001, 0.013072 ], "t": [ 0.12, 1.3, 1.74, 2.1, 0.28, 0.69, 0.75, 2, 4.4, 4.7, 15, 14 ], "type": "ResidualHelmholtzPower" } ], "critical_region_splines": { "T_max": 418.09000000000003, "T_min": 418.08999999951317, "_note": "Coefficients for the critical cubic spline. T = c[0]*rho^3 + c[1]*rho^2 + c[2]*rho + c[3] with rho in mol/m^3 and T in K", "cL": [ 0.0, 0.0, -2.0580323178237388e-08, 418.09008581994766 ], "cV": [ 0.0, 0.0, 2.0591910110230444e-08, 418.0899141317349 ], "rhomolar_max": 4170.023655555847, "rhomolar_min": 4169.976356154625 }, "gas_constant": 8.314472, "gas_constant_units": "J/mol/K", "molar_mass": 0.05610631999999999, "molar_mass_units": "kg/mol", "p_max": 50000000, "p_max_units": "Pa", "pseudo_pure": false } ], "NAME": "IsoButene", "REFPROP_NAME": "IBUTENE", "STATES": { "critical": { "T": 418.09, "T_units": "K", "p": 4009800.0, "p_units": "Pa", "rhomolar": 4170.0, "rhomolar_units": "mol/m^3" }, "triple_liquid": { "T": 132.4, "T_units": "K", "p": 0.6761899069455894, "p_units": "Pa", "rhomolar": 13666.751920875635, "rhomolar_units": "mol/m^3" }, "triple_vapor": { "T": 132.4, "T_units": "K", "p": 0.6761899732705737, "p_units": "Pa", "rhomolar": 0.0006142550272151939, "rhomolar_units": "mol/m^3" } } }