Real-Gas Mixture Thermodynamics · Peng–Robinson EOS

Fluid Property Estimator

Enter a mixture composition, pressure, and temperature to estimate compressibility factor (Z), fluid state, heat capacities (Cp, Cv), the isentropic ratio (k), and density — for quick rotating-equipment and process screening calculations.

Composition 100.0%

Component	Tc (K)	Pc (bar)	mol %

Total 100.0 mol%

Conditions

Pressure

Temperature

Density

—kg/m³

— lb/ft³

Cp (molar / mass)

—J/mol·K

— kJ/kg·K · — Btu/lb·°F

Cv (molar / mass)

—J/mol·K

— kJ/kg·K · — Btu/lb·°F

Heat Capacity Ratio, k = Cp / Cv

—

Viscosity

—µPa·s

— cP

Thermal Conductivity

—mW/m·K

— Btu/(hr·ft·°F)

Mixture MW

—

Specific Gravity (air=1)

—

Pseudo-Tc / Pc

—

Molar Volume

—

Thermodynamic Properties rel. 25°C, 1 bar ideal-gas

Enthalpy

—kJ/kg

— Btu/lb

Entropy

—kJ/kg·K

— Btu/lb·°F

Joule-Thomson Coefficient

—K/bar

— °F/psi

Speed of Sound

—m/s

— ft/s

Isentropic Exponent (real gas)

—

vs Cp/Cv = —

Z-Factor Map Pr–Z

Vapor / Gas Liquid Supercritical - - - Ideal gas (Z = 1)