Standby Systems, Inc. - Physical Constants of Hydrocarbons

Technical Information: Thermodynamic Properties of Normal Saturated Propane

Enthalpies and Entropies are referred to saturated liquid at -200°F where the values are zero.

ATMOSPHERIC PRESSURE = 14.73 PSIA

TEMP	PRESSURE* (PSI)		SPECIFIC VOLUME* (Cf / Lb)		DENSITY* (Lb / Cf)		ENTHALPY** (Btu / Lb)		LATENT HEAT** (Btu/Lb)	ENTROPY** (Btu / Lb / °F)
°F	ABSOLUTE	GAUGE	LIQUID	VAPOR	LIQUID	VAPOR	LIQUID	VAPOR		LIQUID	VAPOR
Temp	APress	GPress	LSpVol	VSpVol	LDen	VDen	LEnthal	VEnthal	Latent	LEntrop	VEntrop
-50	12.60	-2.10	0.02732	7.74	36.60	0.129	79.5	262.7	183.2	0.173	0.617
-45	14.40	-0.30	0.02748	6.89	36.39	0.145	82.3	264.2	181.9	0.179	0.615
-40	16.20	1.50	0.02763	6.13	36.19	0.163	85.0	265.8	180.8	0.185	0.614
-35	18.10	3.40	0.02779	5.51	35.99	0.181	87.5	267.2	179.7	0.190	0.613
-30	20.30	5.60	0.02795	4.93	35.78	0.203	90.2	268.9	178.7	0.196	0.612
-25	22.70	8.00	0.02811	4.46	35.58	0.224	92.8	270.3	177.5	0.202	0.610
-20	25.40	10.70	0.02827	4.00	35.37	0.250	95.6	271.8	176.2	0.208	0.608
-15	28.30	13.60	0.02844	3.60	35.16	0.278	98.3	273.2	174.9	0.214	0.607
-10	31.40	16.70	0.02860	3.26	34.96	0.307	101.0	274.9	173.9	0.220	0.607
-5	34.70	20.00	0.02878	2.97	34.75	0.337	103.8	276.2	172.4	0.226	0.606
0	38.20	23.50	0.02985	2.71	34.54	0.369	106.2	277.7	171.5	0.231	0.605
5	41.90	27.20	0.02913	2.48	34.33	0.403	108.8	279.0	170.2	0.236	0.604
10	46.00	31.30	0.02931	2.27	34.12	0.441	111.3	280.5	167.2	0.246	0.603
15	50.60	35.90	0.02950	2.07	33.90	0.483	114.0	281.8	167.8	0.248	0.602
20	55.50	40.80	0.02970	1.90	33.67	0.526	116.8	283.1	166.3	0.254	0.601
25	60.90	46.20	0.02991	1.74	33.43	0.575	119.7	284.4	164.7	0.260	0.600
30	66.30	51.60	0.03012	1.60	33.20	0.625	122.3	285.7	163.4	0.266	0.599
35	72.00	57.30	0.03033	1.48	32.97	0.676	125.0	287.0	162.0	0.272	0.598
40	78.00	63.30	0.03055	1.37	32.73	0.730	128.0	288.3	160.3	0.278	0.597
45	84.60	69.90	0.03078	1.27	32.49	0.787	131.1	289.5	158.4	0.285	0.596
50	91.80	77.10	0.03102	1.18	32.24	0.847	134.2	290.7	156.5	0.292	0.596
55	99.30	84.60	0.03125	1.10	32.00	0.909	137.2	292.0	154.8	0.298	0.596
60	107.10	92.40	0.03150	1.01	31.75	0.990	140.6	293.2	152.6	0.306	0.595
65	115.40	100.70	0.03174	0.945	31.50	1.060	143.8	294.5	150.7	0.313	0.594
70	124.00	109.30	0.03201	0.883	31.24	1.130	147.5	295.8	148.3	0.321	0.594
75	133.20	118.50	0.03229	0.825	30.97	1.210	150.3	296.9	146.6	0.327	0.594
80	142.80	128.10	0.03257	0.770	30.70	1.300	154.0	299.1	145.1	0.335	0.593
85	153.10	138.40	0.03287	0.722	30.42	1.390	157.0	299.2	142.2	0.342	0.593
90	164.00	149.30	0.03317	0.673	30.15	1.490	160.3	300.3	140.0	0.349	0.593
95	175.00	160.30	0.03348	0.632	29.87	1.580	163.4	301.3	137.9	0.356	0.592
100	187.00	172.30	0.03381	0.591	29.58	1.690	166.8	302.4	135.6	0.363	0.592
105	200.00	185.30	0.03416	0.553	29.27	1.810	169.8	303.2	133.4	0.370	0.592
110	212.00	197.30	0.03453	0.520	28.96	1.920	172.8	304.0	131.2	0.376	0.591
115	226.00	211.30	0.03493	0.488	28.63	2.050	176.2	304.7	128.5	0.383	0.590
120	240.00	225.30	0.03534	0.459	28.30	2.180	179.8	305.2	125.4	0.391	0.589
125	254.00	239.30	0.03575	0.432	27.97	2.310	183.5	305.8	122.3	0.399	0.588
130	272.00	257.30	0.03618	0.404	27.64	2.480	186.8	306.1	119.3	0.406	0.587
135	288.00	273.30	0.03662	0.382	27.32	2.620	190.0	306.3	116.3	0.413	0.586
140	305.00	290.30	0.03707	0.360	27.00	2.780	194.0	306.5	112.5	0.422	0.585

*Based on material from Dana, Jenkins, Burick and Timm, Refrigerating Engineering, June 1926, Vol. 12, No. 12, page 403
**From Mollier Diagrams for Propane, W.C. Edminster, Standard Oil Co., (Indiana)