Ethylene (data page)

This page provides supplementary chemical data on ethylene.

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, Δ_fusH^o	+3.35 kJ/mol
Std entropy change of fusion, Δ_fusS^o	+32.2 J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	+13.5 kJ/mol
Std entropy change of vaporization, Δ_vapS^o	? J/(mol·K)
Solid properties
Std enthalpy change of formation, Δ_fH^o_solid	? kJ/mol
Standard molar entropy, S^o_solid	? J/(mol K)
Heat capacity, c_p	? J/(mol K)
Liquid properties
Std enthalpy change of formation, Δ_fH^o_liquid	? kJ/mol
Standard molar entropy, S^o_liquid	117.8 J/(mol K)
Heat capacity, c_p	67.4 J/(mol K)
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	+52.47 kJ/mol
Standard molar entropy, S^o_gas	219.32 J/(mol K)
Enthalpy of combustion, Δ_cH^o	–1387.4 kJ/mol
Heat capacity, c_p	42.9 J/(mol K)
van der Waals' constants^[1]	a = 453.02 L² kPa/mol² b = 0.05714 liter per mole

P in mmHg		1	10	40	100	400	760	1520	3800	7600	15200	30400
T in °C		–168.3	–153.2	–141.3	–131.8	–113.9	–103.7	–90.8	–71.1	–52.8	–29.1	–1.5	—

Structure and properties