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)

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.

Back to top

Back to top

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

For full table with Imperial units - rotate the screen!

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

For full table with Imperial units - rotate the screen!

Back to top

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

Back to top

Temperature ^oC
K
^oF

Length m
km
in
ft
yards
miles
naut miles

Area m²
km²
in²
ft²
miles²
acres

Volume m³
liters
in³
ft³
us gal

Weight kg_f
N
lbf

Velocity m/s
km/h
ft/min
ft/s
mph
knots

Pressure Pa
bar
mm H₂O
kg/cm²
psi
inches H₂O

Flow m³/s
m³/h
US gpm
cfm