Ethanol - Specific Heat vs. Temperature and Pressure

Specific heat (C) is the amount of heat required to change the temperature of a mass unit of a substance by one degree.

• Isobaric specific heat  (C_p) is used for ethanol in a constant pressure (ΔP = 0) system.
• Isochoric specific heat  (C_v) is used for ethanol in a constant-volume, (= isovolumetric or isometric) closed system.

At ambient pressure and temperature the isobaric specific heat, C_P, of liquid ethanol is 2.57 [kJ/kg K] or 0.614 [Btu/lb °F] = [cal/g K], while the isochoric specific heat, C_V, is 2.18 [kJ/kg K] or 0.520 [Btu/lb °F] = [cal/g K].

However,  the specific heat  - C_P and C_V - will vary with temperature. This may influence on the accuracy of ethanol conditioning and industrial ethanol handling process calculations. When calculating mass and volume flow of ethanol in heated or cooled systems with high accuracy - the specific heat (= heat capacity) should be corrected according values in the figures and table below, or found by use of the calculator.

• Specific heat unit conversion

Online Liquid Ethanol Specific Heat Calculator

The calculator below can be used to estimate the specific heat of liquid ethanol at constant volum(C_V) or constant pressure(C_P) and at given temperature. For practical purpose the specific heat of liquid ethanol is constant with varying pressure up to critical point (241°C, 61.5 bara / 465°F, 892 psia).
The output specific heat is given as kJ/(kmol*K), kJ/(kg*K), kWh/(kg*K), kcal/(kg*K), Btu(IT)/(mol*°R) and Btu(IT)/(lb_m*°R)

Temperature

Choose the actual unit of temperature: °C  °F  K  °R 

See also other properties of Ethanol at varying temperature and pressure: Density and specific weight and Dynamic and kinematic viscosity, and Thermophysical properties at standard conditions, 
as well as Specific heat (Heat capacity) of  Air - at Constant Pressure and Varying Temperature,  Air - at Constant Temperature and Varying Pressure, Ammonia, Butane, Carbon dioxide, Carbon monoxide, Ethane, Ethylene, Hydrogen, Methane, Methanol, Nitrogen, Oxygen, Propane and Water.

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Isobaric specific heat, C_P, of ethanol at given temperatures and pressures:

For full table with Imperial units - rotate the screen!

State	Temperature			Pressure			Specific heat at constant pressure, CP (isobaric)					Cp/Cv
	[K]	[°C]	[°F]	[MPa]	[bara]	[psia]	[kJ/mol K]	[kJ/kg K]	[kWh/(kg K)]	[kcal(IT)/(kg K)], [Btu(IT)/lb °F]	[Btu(IT)/(mol*°R)]	[-]
Liquid	250	-23.2	-9.7	0.000270	0.00270	0.0392	0.09361	2.032	0.000564	0.4853	0.04929	1.22
	280	6.9	44.3	0.00258	0.0258	0.375	0.1083	2.351	0.000653	0.5614	0.05702	1.18
	298.2	25.0	77.0	0.0080	0.080	1.16	0.1184	2.570	0.000714	0.6138	0.06234	1.18
	310	36.9	98.3	0.0153	0.153	2.22	0.1252	2.719	0.000755	0.6493	0.06595	1.17
	340	66.9	152	0.0635	0.635	9.22	0.1412	3.064	0.000851	0.7318	0.07432	1.19
	370	96.9	206	0.2021	2.021	29.30	0.1554	3.374	0.000937	0.8058	0.08184	1.22
	400	127	260	0.5245	5.245	76.07	0.1688	3.665	0.00102	0.8753	0.08890	1.26
	423.9	151	303	1.000	10.00	145.0	0.1802	3.910	0.00109	0.9340	0.09486	1.31
	430	157	314	1.165	11.65	169.0	0.1834	3.981	0.00111	0.9509	0.09658	1.33
	460	187	368	2.292	22.92	332.4	0.2050	4.451	0.00124	1.063	0.1080	1.46
	490	217	422	4.095	40.95	594.0	0.2651	5.754	0.00160	1.374	0.1396	1.86
	501.4	228	443	5.000	50.00	725.2	0.3515	7.630	0.00212	1.822	0.1851	2.45
Gas	250	-23.2	-9.7	0.000270	0.00270	0.0392	0.06722	1.459	0.000405	0.3485	0.03539	1.14
	280	6.9	44.3	0.00258	0.0258	0.375	0.07115	1.544	0.000429	0.3689	0.03746	1.13
	298.2	25.0	77.0	0.0080	0.0800	1.16	0.07380	1.602	0.000445	0.3826	0.03886	1.13
	310	36.9	98.3	0.0153	0.153	2.22	0.07546	1.638	0.000455	0.3912	0.03974	1.13
	340	66.9	152	0.0635	0.635	9.22	0.08074	1.753	0.000487	0.4186	0.04251	1.13
	370	96.9	206	0.2021	2.021	29.30	0.08806	1.911	0.000531	0.4565	0.04637	1.15
	400	127	260	0.5245	5.245	76.07	0.09894	2.148	0.000597	0.5129	0.05210	1.18
	423.9	151	303	1.000	10.00	145.0	0.1118	2.428	0.000674	0.5798	0.05889	1.24
	430	157	314	1.165	11.65	169.0	0.1161	2.520	0.000700	0.6019	0.06113	1.26
	460	187	368	2.292	22.92	332.4	0.1473	3.197	0.000888	0.7635	0.07755	1.43
	490	217	422	4.095	40.95	594.0	0.2320	5.036	0.00140	1.203	0.1222	1.98
	501.4	228	443	5.000	50.00	725.2	0.3410	7.402	0.00206	1.768	0.1796	2.75
Liquid	300	26.9	80.3	0.1	1	14.5	0.1196	2.597	0.000721	0.6202	0.06299	1.17
	351.1	77.9	172	0.1	1	14.5	0.1466	3.182	0.000884	0.7599	0.07718	1.20
Gas	351.1	77.9	172	0.1	1	14.5	0.08313	1.804	0.000501	0.4310	0.04377	1.14
	400	127	260	0.1	1	14.5	0.09000	1.954	0.000543	0.4666	0.04739	1.12
	500	227	440	0.1	1	14.5	0.1016	2.206	0.000613	0.5268	0.05351	1.09
	600	327	620	0.1	1	14.5	0.1125	2.442	0.000678	0.5834	0.05925	1.08
Liquid	300	26.9	80.3	1	10	145	0.1195	2.595	0.000721	0.6198	0.06294	1.17
	400	127	260	1	10	145	0.1686	3.659	0.001016	0.8740	0.08876	1.26
	423.9	151	303	1	10	145	0.1802	3.910	0.001086	0.9340	0.09486	1.31
Gas	423.9	151	303	1	10	145	0.1118	2.428	0.000674	0.5798	0.05889	1.24
	500	227	440	1	10	145	0.1101	2.389	0.000664	0.5707	0.05796	1.14
	600	327	620	1	10	145	0.1161	2.519	0.000700	0.6017	0.06111	1.10
Liquid	300	26.9	80.3	5	50	725	0.1192	2.588	0.000719	0.6181	0.06278	1.17
	400	127	260	5	50	725	0.1666	3.616	0.00100	0.8636	0.08771	1.25
	501.4	228	443	5	50	725	0.3515	7.630	0.00212	1.822	0.1851	2.45
Gas	501.4	228	443	5	50	725	0.3410	7.402	0.00206	1.768	0.1796	2.75
	600	327	620	5	50	725	0.1366	2.965	0.000824	0.7082	0.07192	1.20
Liquid	300	26.9	80.3	10	100	1450	0.1189	2.580	0.000717	0.6162	0.06258	1.17
Supercritical phase	400	127	260	10	100	1450	0.1646	3.572	0.000992	0.8532	0.08665	1.24
	500	227	440	10	100	1450	0.2220	4.820	0.00134	1.151	0.1169	1.58
	600	327	620	10	100	1450	0.1874	4.069	0.00113	0.9718	0.09870	1.49
Liquid	300	26.9	80.3	100	1000	14500	0.1157	2.512	0.000698	0.5999	0.06093	1.14
Supercritical phase	400	127	260	100	1000	14500	0.1508	3.274	0.000909	0.7819	0.07941	1.17
	500	227	440	100	1000	14500	0.1643	3.567	0.000991	0.8520	0.08653	1.24
	600	327	620	100	1000	14500	0.1655	3.593	0.000998	0.8582	0.08716	1.32
Supercritical phase	300	26.9	80.3	200	2000	29000	0.1150	2.495	0.000693	0.5960	0.06053	1.13
	400	127	260	200	2000	29000	0.1454	3.156	0.000877	0.7538	0.07656	1.15
	500	227	440	200	2000	29000	0.1562	3.391	0.000942	0.8100	0.08226	1.21
	600	327	620	200	2000	29000	0.1557	3.379	0.000939	0.8070	0.08196	1.29

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Isochoric specific heat, C_V, of ethanol at given temperatures and pressures:

For full table with Imperial units - rotate the screen!

State	Temperature			Pressure			Specific heat at constant volume,  CV  (isochoric)					Cp/Cv
	[K]	[°C]	[°F]	[MPa]	[bara]	[psia]	[kJ/mol K]	[kJ/kg K]	[kWh/(kg K)]	[kcal(IT)/(kg K)], [Btu(IT)/lb °F]	[Btu(IT)/(mol*°R)]	[-]
Liquid at equilibrium	250	-23.2	-9.7	0.000270	0.00270	0.0392	0.07666	1.664	0.000462	0.3974	0.04036	1.22
	280	6.9	44.3	0.00258	0.0258	0.375	0.09165	1.989	0.000553	0.4752	0.04826	1.18
	298.2	25.0	77.0	0.0080	0.080	1.16	0.1003	2.178	0.000605	0.5202	0.05283	1.18
	310	36.9	98.3	0.0153	0.153	2.22	0.1067	2.316	0.000643	0.5532	0.05618	1.17
	340	66.9	152	0.0635	0.635	9.22	0.1189	2.582	0.000717	0.6166	0.06262	1.19
	370	96.9	206	0.2021	2.021	29.30	0.1279	2.777	0.000771	0.6632	0.06736	1.22
	400	127	260	0.5245	5.245	76.07	0.1341	2.910	0.000808	0.6950	0.07059	1.26
	423.9	151	303	1.000	10.00	145.0	0.1373	2.981	0.000828	0.7119	0.07231	1.31
	430	157	314	1.165	11.65	169.0	0.1380	2.995	0.000832	0.7154	0.07265	1.33
	460	187	368	2.292	22.92	332.4	0.1404	3.048	0.000847	0.7280	0.07393	1.46
	490	217	422	4.095	40.95	594.0	0.1423	3.090	0.000858	0.7380	0.07495	1.86
	501.4	228	443	5.000	50.00	725.2	0.1434	3.113	0.000865	0.7435	0.07551	2.45
Gas at equilibrium	250	-23.2	-9.7	0.000270	0.00270	0.0392	0.05889	1.278	0.000355	0.3053	0.03101	1.14
	280	6.9	44.3	0.00258	0.0258	0.375	0.06275	1.362	0.000378	0.3253	0.03304	1.13
	298.2	25.0	77.0	0.0080	0.080	1.16	0.06531	1.418	0.000394	0.3386	0.03439	1.13
	310	36.9	98.3	0.0153	0.153	2.22	0.06682	1.450	0.000403	0.3464	0.03518	1.13
	340	66.9	152	0.0635	0.635	9.22	0.07134	1.548	0.000430	0.3698	0.03756	1.13
	370	96.9	206	0.2021	2.021	29.30	0.07684	1.668	0.000463	0.3984	0.04046	1.15
	400	127	260	0.5245	5.245	76.07	0.08377	1.818	0.000505	0.4343	0.04411	1.18
	423.9	151	303	1.000	10.00	145.0	0.09052	1.965	0.000546	0.4693	0.04766	1.24
	430	157	314	1.165	11.65	169.0	0.09245	2.007	0.000557	0.4793	0.04868	1.26
	460	187	368	2.292	22.92	332.4	0.1032	2.241	0.000622	0.5352	0.05436	1.43
	490	217	422	4.095	40.95	594.0	0.1171	2.542	0.000706	0.6071	0.06165	1.98
	501.4	228	443	5.000	50.00	725.2	0.1239	2.689	0.000747	0.6423	0.06524	2.75
Liquid	300	26.9	80.3	0.1	1	14.5	0.1019	2.213	0.000615	0.5285	0.05367	1.17
	351.1	77.9	172	0.1	1	14.5	0.1226	2.661	0.000739	0.6357	0.06456	1.20
Gas	351.1	77.9	172	0.1	1	14.5	0.07322	1.589	0.000441	0.3796	0.03856	1.14
	400	127	260	0.1	1	14.5	0.08064	1.750	0.000486	0.4181	0.04246	1.12
	500	227	440	0.1	1	14.5	0.09291	2.017	0.000560	0.4817	0.04892	1.09
	600	327	620	0.1	1	14.5	0.10403	2.258	0.000627	0.5393	0.05478	1.08
Liquid	300	26.9	80.3	1	10	145	0.1019	2.212	0.000614	0.5284	0.05366	1.17
	400	127	260	1	10	145	0.1340	2.909	0.000808	0.6947	0.07056	1.26
	423.9	151	303	1	10	145	0.1373	2.981	0.000828	0.7119	0.07231	1.31
Gas	423.9	151	303	1	10	145	0.09052	1.965	0.000546	0.4693	0.04766	1.24
	500	227	440	1	10	145	0.09695	2.105	0.000585	0.5027	0.05105	1.14
	600	327	620	1	10	145	0.10581	2.297	0.000638	0.5486	0.05572	1.10
Liquid	300	26.9	80.3	5	50	725	0.1019	2.211	0.000614	0.5280	0.05363	1.17
	400	127	260	5	50	725	0.1336	2.900	0.000806	0.6926	0.07034	1.25
	501.4	228	443	5	50	725	0.1434	3.113	0.000865	0.7435	0.07551	2.45
Gas	501.4	228	443	5	50	725	0.1239	2.689	0.000747	0.6423	0.06524	2.75
	600	327	620	5	50	725	0.1142	2.479	0.000689	0.5920	0.06013	1.20
Liquid	300	26.9	80.3	10	100	1450	0.1018	2.210	0.000614	0.5277	0.05360	1.17
Supercritical phase	400	127	260	10	100	1450	0.1331	2.890	0.000803	0.6902	0.07010	1.24
	500	227	440	10	100	1450	0.1403	3.046	0.000846	0.7274	0.07388	1.58
	600	327	620	10	100	1450	0.1260	2.735	0.000760	0.6532	0.06634	1.49
Liquid	300	26.9	80.3	100	1000	14500	0.1015	2.203	0.000612	0.5262	0.05344	1.14
Supercritical phase	400	127	260	100	1000	14500	0.1290	2.800	0.000778	0.6689	0.06793	1.17
	500	227	440	100	1000	14500	0.1322	2.870	0.000797	0.6854	0.06962	1.24
	600	327	620	100	1000	14500	0.1258	2.730	0.000758	0.6520	0.06621	1.32
Supercritical phase	300	26.9	80.3	200	2000	29000	0.1020	2.213	0.000615	0.5286	0.05369	1.13
	400	127	260	200	2000	29000	0.1268	2.752	0.000764	0.6573	0.06676	1.15
	500	227	440	200	2000	29000	0.1287	2.793	0.000776	0.6671	0.06776	1.21
	600	327	620	200	2000	29000	0.1207	2.619	0.000728	0.6256	0.06353	1.29

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Unit conversion:

Specific heat unit converter

british thermal unit(International table) = [Btu(IT)], degree celcius = [°C], degree fahrenheit = [°F], degree kelvin = [K], degree rankin = [°R], joule = [J], kilocalorie(International table) = [kcal(IT)], kilogram = [kg], kilojoule = [kJ], kilowatthour = [kWh], mole = [mol], pound =[lb]

K in the units can be replaced by °C, and vise versa. °R in the units can be replaced by °F, and vise versa.

• 1 Btu/(lb °F) = 1 Btu/(lb °R) = 1 kcal(IT)/(kg °C) = 1 kcal(IT)/(kg K) = 4186.8 J/(kg K) = 0.81647 kcal(IT)/(lb °F) = 1.163x10^-3 kWh/(kg K)
• 1 J/(kg K) = 1 J/(kg °C) = 2.3885x10^-4 kcal(IT)/(kg ^oC) = 2.3885x10^-4 Btu/(lb °F) = 1.9501x10^-4 kcal(IT)/(lb °F)
• 1 kcal(IT)/(kg °C) = 1 Btu/(lb °F) = 4186.8 J/(kg K) = 0.81647 kcal(IT)/(lb °F) = 1.163x10^-3 kWh/(kg K)
• 1 kcal(IT)/(lb °F) = 1.2248 Btu/(lb °F) = 1.2248 kcal(IT)/(kg °C) = 5127.9 J/(kg K)
• 1 kJ/(kg K) = 1 kJ/(kg °C) = 1000 J/(kg K) = 1000 J/(kg °C) = 0.23885 kcal(IT)/(kg °C) = 0.23885 Btu/(lb °F) = 0.19501 kcal(IT)/(lb °F) = 2.7778x10^-4 kWh/(kg K)
• 1 kWh/(kg K) = 0.85985 kcal(IT)/(kg °C) = 0.85985 Btu/(lb °F) = 3.6 kJ/(kg K) 
• 1 mol of air = 28.96546 g

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• Engineering ToolBox, (2018). Ethanol - Specific Heat vs. Temperature and Pressure. [online] Available at: https://www.engineeringtoolbox.com/specific-heat-capacity-ethanol-Cp-Cv-isobaric-isochoric-ethyl-alcohol-d_2030.html [Accessed Day Mo. Year].

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