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# 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 (Cp ) is used for ethanol in a constant pressure (ΔP = 0) system.
• I sochoric specific heat  (Cv ) is used for ethanol in a constant-volume , (= isovolumetric or isometric ) closed system.

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

However,  the specific heat  - CP and CV - 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.

### Online Liquid Ethanol Specific Heat Calculator

The calculator below can be used to estimate the specific heat of liquid ethanol at constant volum(CV ) or constant pressure(CP ) 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)/(lbm *°R)

Choose the actual unit of temperature:

.

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 .

.

Isobaric specific heat, CP, of ethanol at given temperatures and pressure s:

For full table with Imperial units - rotate the screen!

Ethanol - Specific Heat vs. Temperature and Pressure
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
.

Isochoric specific heat, CV, of ethanol at given temperatures and pressure s:

For full table with Imperial units - rotate the screen!

Ethanol - Specific Heat vs. Temperature and Pressure
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

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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