Thermodynamical Quantities of Chalcogenide Dimers (O₂, S₂, Se₂, and Te₂) from Spectroscopic Data

Table 3

Calculated thermodynamical properties of selenium molecule (Se₂) at 1 Atm.

T (K)	Se2 molecule
	F (kJ/mole)	H (kJ/mole)	S (J/mole/K)	𝐶𝑝 (J/mole/K)
100	17.79	2.07	216.34	30.09
200	39.72	5.72	238.37	33.64
300	63.39	8.68	252.40	35.38
400	88.25	11.60	262.72	36.17
500	114.02	14.53	270.86	36.58
600	140.54	17.46	277.57	36.81
700	167.67	20.40	283.27	36.96
800	195.32	23.34	288.23	37.05
900	223.45	26.29	292.61	37.12
1000	251.98	29.24	296.54	37.16
1100	280.89	32.20	300.10	37.20
1200	310.14	35.17	303.36	37.23
1300	339.70	38.14	306.35	37.25
1400	369.54	41.12	309.13	37.26
1500	399.65	44.10	311.71	37.28
1600	430.01	47.09	314.14	37.29
1700	460.61	50.09	316.41	37.29
1800	491.42	53.09	318.56	37.30
1900	522.44	56.10	320.59	37.31
2000	553.65	59.11	322.52	37.31
2100	585.06	62.13	324.36	37.32
2200	616.64	65.16	326.11	37.32
2300	648.39	68.19	327.78	37.32
2400	680.30	71.23	329.38	37.32
2500	712.37	74.27	330.92	37.33
2600	744.59	77.32	332.40	37.33
2700	776.95	80.38	333.83	37.33
2800	809.45	83.44	335.20	37.33
2900	842.09	86.51	336.52	37.33
3000	874.85	89.59	337.80	37.33

Where F is free energy (kJ/mole), H is enthalpy (kJ/mole), S is entropy (J/mole/K), 𝐶_𝑝 is specific heat (J/mole/K), and T is temperature (K).