Ethylene (data Page) - Thermodynamic Properties

Thermodynamic Properties

Phase behavior
Triple point 104 K (−169 °C), 120 Pa
Critical point 282.5 K (9.4 °C), 50.6 bar
Std enthalpy change
of fusion, ΔfusHo		 +3.35 kJ/mol
Std entropy change
of fusion, ΔfusSo		 +32.2 J/(mol·K)
Std enthalpy change
of vaporization, ΔvapHo		 +13.5 kJ/mol
Std entropy change
of vaporization, ΔvapSo		 ? J/(mol·K)
Solid properties
Std enthalpy change
of formation, ΔfHosolid		 ? kJ/mol
Standard molar entropy,
Sosolid		 ? J/(mol K)
Heat capacity, cp ? J/(mol K)
Liquid properties
Std enthalpy change
of formation, ΔfHoliquid		 ? kJ/mol
Standard molar entropy,
Soliquid		 117.8 J/(mol K)
Heat capacity, cp 67.4 J/(mol K)
Gas properties
Std enthalpy change
of formation, ΔfHogas		 +52.47 kJ/mol
Standard molar entropy,
Sogas		 219.32 J/(mol K)
Enthalpy of combustion, ΔcHo –1387.4 kJ/mol
Heat capacity, cp 42.9 J/(mol K)
van der Waals' constants a = 453.02 L2 kPa/mol2
b = 0.05714 liter per mole

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