R125 Thermodynamic properties

Saturation tables by temperature and by pressure, superheated vapor table, p–h and T–s diagrams and constants of R125 (C₂F₅H), computed with CoolProp. Any other state of R125, from any two properties, in the State Explorer or the Worksheet.

Calculate a state of R125 Open it in the Worksheet

Constants

Formula: C₂F₅H
CAS: 354-33-6
Molar mass: 120.02 g/mol
Normal boiling point (1 atm): -48.089 °C (225.06 K)
Critical temperature: 66.027 °C (339.18 K)
Critical pressure: 3.6183 MPa
Critical density: 573.4 kg/m³
Triple point: -100.63 °C, 2.914 kPa
Acentric factor: 0.3052
Valid up to: 226.85 °C, 60 MPa

Saturation table

By temperature: saturated liquid (f) and saturated vapor (g).

Saturated R125, by temperature
T °C	Psat kPa	vf m³/kg	vg m³/kg	hf kJ/kg	hfg kJ/kg	hg kJ/kg	sf kJ/(kg·K)	sg kJ/(kg·K)
-100	3.0883	0.00059219	3.8709	87.782	189.96	277.74	0.494	1.5911
-80	15.468	0.00061599	0.85534	108.7	180.37	289.07	0.60825	1.5421
-60	54.318	0.00064281	0.26432	130.19	170.41	300.6	0.71398	1.5135
-40	148.3	0.00067384	0.10283	152.44	159.6	312.04	0.81345	1.498
-20	337.33	0.00071101	0.04688	175.62	147.41	323.03	0.90829	1.4906
0	670.52	0.00075768	0.02377	200	133.16	333.16	1	1.4875
20	1205.2	0.00082082	0.012826	226.02	115.57	341.58	1.0904	1.4846
40	2008.5	0.00091878	0.0070165	254.67	92.024	346.69	1.1826	1.4765
60	3170.3	0.0011467	0.0033971	290.1	52.112	342.21	1.2884	1.4448

Saturation table by pressure

By pressure: saturated liquid (f) and saturated vapor (g).

Saturated R125, by pressure
P kPa	Tsat °C	vf m³/kg	vg m³/kg	hf kJ/kg	hfg kJ/kg	hg kJ/kg	sf kJ/(kg·K)	sg kJ/(kg·K)
3	-100.31	0.00059183	3.9779	87.456	190.11	277.57	0.49211	1.5921
5	-94.552	0.00059843	2.4624	93.434	187.35	280.79	0.52613	1.5752
10	-85.948	0.00060864	1.2863	102.43	183.24	285.66	0.57529	1.5541
20	-76.278	0.00062072	0.67269	112.65	178.56	291.21	0.62849	1.5355
30	-70.041	0.0006289	0.46051	119.32	175.49	294.8	0.6618	1.5258
50	-61.472	0.00064071	0.28563	128.59	171.17	299.75	0.70644	1.5151
100	-48.356	0.00066026	0.14911	143.04	164.25	307.29	0.77254	1.5032
200	-33.154	0.00068574	0.077422	160.26	155.61	315.87	0.84636	1.4947
300	-23.093	0.00070475	0.052507	171.97	149.41	321.37	0.89387	1.4914
500	-8.957	0.00073529	0.031892	188.91	139.86	328.77	0.95921	1.4886
1000	13.309	0.00079714	0.015699	217.09	121.94	339.03	1.0602	1.4859
2000	39.823	0.00091764	0.007055	254.4	92.272	346.67	1.1818	1.4766
3000	57.49	0.0010964	0.0038125	284.72	59.466	344.18	1.2728	1.4526

Diagrams

p–h diagram of R125, with isotherms

T–s diagram of R125, with isobars

Superheated vapor table

At each pressure, from its saturated vapor (Sat.) to higher temperatures.

Superheated R125 at 20 kPa (Tsat -76.278 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.67269	277.75	291.21	1.5355
-50	0.76641	292.82	308.15	1.6162
0	0.94229	324.71	343.55	1.7591
50	1.1168	360.64	382.98	1.8914
100	1.2907	400.35	426.16	2.0156
150	1.4644	443.49	472.78	2.1327
200	1.638	489.7	522.46	2.2436

Superheated R125 at 50 kPa (Tsat -61.472 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.28563	285.47	299.75	1.5151
-50	0.30257	292.29	307.42	1.5503
0	0.37459	324.41	343.14	1.6945
50	0.4452	360.45	382.71	1.8274
100	0.51525	400.21	425.98	1.9517
150	0.58501	443.39	472.64	2.069
200	0.65463	489.62	522.35	2.18

Superheated R125 at 100 kPa (Tsat -48.356 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.14911	292.38	307.29	1.5032
0	0.18533	323.91	342.45	1.6447
50	0.22133	360.13	382.27	1.7784
100	0.25674	399.99	425.66	1.9031
150	0.29187	443.22	472.41	2.0206
200	0.32686	489.48	522.17	2.1317

Superheated R125 at 200 kPa (Tsat -33.154 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.077422	300.38	315.87	1.4947
0	0.090639	322.88	341.01	1.5928
50	0.10938	359.49	381.36	1.7283
100	0.12749	399.54	425.03	1.8539
150	0.14531	442.88	471.94	1.9718
200	0.16297	489.2	521.8	2.0831

Superheated R125 at 500 kPa (Tsat -8.957 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.031892	312.82	328.77	1.4886
0	0.033594	319.45	336.25	1.5164
50	0.042145	357.45	378.52	1.6585
100	0.049917	398.14	423.1	1.7866
150	0.057361	441.83	470.51	1.9058
200	0.064641	488.37	520.69	2.0178

Superheated R125 at 1 MPa (Tsat 13.309 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.015699	323.33	339.03	1.4859
50	0.019616	353.66	373.28	1.5984
100	0.024031	395.68	419.71	1.732
150	0.028044	440.03	468.07	1.8535
200	0.031869	486.95	518.82	1.9668

Superheated R125 at 2 MPa (Tsat 39.823 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.007055	332.56	346.67	1.4766
50	0.0079752	343.47	359.42	1.5167
100	0.011025	390.16	412.21	1.6688
150	0.013379	436.2	462.96	1.7964
200	0.015494	484.02	515.01	1.9127

Enthalpy and entropy are measured from R125's own reference state (CoolProp's default). The textbooks' refrigerant tables use ASHRAE's: in the Worksheet, write reference ASHRAE.