Phosphorus difluoride

Formula: F₂P
Molecular weight: 68.970568
IUPAC Standard InChI: InChI=1S/F2P/c1-3-2
IUPAC Standard InChIKey: MSGYRGHIEBLFLX-UHFFFAOYSA-N
CAS Registry Number: 13873-52-4
Chemical structure:
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Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
C_p = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.

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Temperature (K)	298. - 600.	600. - 6000.
A	4.482720	13.65950
B	30.38291	0.220033
C	-39.19130	-0.073740
D	18.73280	0.009034
E	0.011879	-0.394813
F	-119.0340	-121.9990
G	60.85760	77.38351
H	-116.6960	-116.6960
Reference	Chase, 1998	Chase, 1998
Comment	Data last reviewed in June, 1977	Data last reviewed in June, 1977

Temperature (K)	C_p (cal/mol*K)	S° (cal/mol*K)	-(G° - H°_298.15)/T (cal/mol*K)	H° - H°_298.15 (kcal/mol)
298.	10.69	62.84	62.85	-0.00
300.	10.71	62.91	62.85	0.02
400.	11.64	66.13	63.28	1.14
500.	12.27	68.80	64.13	2.34
600.	12.68	71.08	65.10	3.59

Temperature (K)	C_p (cal/mol*K)	S° (cal/mol*K)	-(G° - H°_298.15)/T (cal/mol*K)	H° - H°_298.15 (kcal/mol)
600.	12.67	71.07	65.10	3.59
700.	12.97	73.05	66.10	4.87
800.	13.18	74.80	67.08	6.18
900.	13.32	76.36	68.02	7.50
1000.	13.42	77.77	68.93	8.84
1100.	13.50	79.05	69.79	10.19
1200.	13.56	80.23	70.61	11.54
1300.	13.61	81.31	71.39	12.90
1400.	13.65	82.32	72.14	14.26
1500.	13.68	83.27	72.85	15.63
1600.	13.71	84.15	73.53	16.99
1700.	13.73	84.98	74.18	18.37
1800.	13.75	85.77	74.80	19.74
1900.	13.76	86.51	75.40	21.12
2000.	13.78	87.22	75.97	22.49
2100.	13.79	87.89	76.52	23.87
2200.	13.80	88.53	77.05	25.25
2300.	13.81	89.15	77.57	26.63
2400.	13.82	89.73	78.06	28.01
2500.	13.83	90.30	78.54	29.40
2600.	13.83	90.84	79.00	30.78
2700.	13.84	91.36	79.45	32.16
2800.	13.85	91.87	79.89	33.55
2900.	13.85	92.35	80.31	34.93
3000.	13.86	92.82	80.72	36.32
3100.	13.86	93.28	81.11	37.70
3200.	13.87	93.72	81.50	39.09
3300.	13.87	94.14	81.88	40.48
3400.	13.88	94.56	82.24	41.86
3500.	13.88	94.96	82.60	43.25
3600.	13.89	95.35	82.95	44.64
3700.	13.89	95.73	83.29	46.03
3800.	13.90	96.10	83.62	47.42
3900.	13.91	96.46	83.95	48.81
4000.	13.91	96.81	84.27	50.20
4100.	13.92	97.16	84.58	51.59
4200.	13.93	97.49	84.88	52.98
4300.	13.94	97.82	85.18	54.38
4400.	13.95	98.14	85.47	55.77
4500.	13.96	98.46	85.75	57.17
4600.	13.97	98.76	86.03	58.56
4700.	13.98	99.06	86.31	59.96
4800.	14.00	99.36	86.57	61.36
4900.	14.01	99.65	86.84	62.76
5000.	14.03	99.93	87.10	64.16
5100.	14.05	100.2	87.35	65.57
5200.	14.07	100.5	87.60	66.97
5300.	14.09	100.7	87.85	68.38
5400.	14.11	101.0	88.09	69.79
5500.	14.13	101.3	88.33	71.20
5600.	14.15	101.5	88.56	72.62
5700.	14.18	101.8	88.79	74.03
5800.	14.21	102.0	89.02	75.45
5900.	14.23	102.3	89.24	76.87
6000.	14.27	102.5	89.46	78.30

References

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Notes

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), References

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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