Octane Thermal Properties

Reference data and engineering information about octane thermal properties for thermodynamics applications.

octanethermalpropertiesData Table

Overview

Engineering reference data for Octane Thermal Properties in thermodynamics.

Key Formulas

First Law

$\Delta U = Q - W$

Energy is conserved — heat added minus work done.

Ideal Gas Law

$PV = nRT$

Relates pressure, volume, and temperature of an ideal gas.

Heat Transfer

$Q = mc\Delta T$

Sensible heat transfer.

Carnot Efficiency

$\eta = 1 - T_C/T_H$

Maximum efficiency between two temperatures.

Variables

Symbol	Description	Unit
$U$	Internal energy	J
$Q$	Heat	J
$W$	Work	J
$P$	Pressure	Pa
$V$	Volume	m³
$T$	Temperature	K

Thermal Property Data

2 rows

Liquid octane thermal properties at various temperatures.
Temperature (t)(°C)	Density (ρ)(kg/m³)	Specific Heat (cp)(kJ/kg K)	Thermal Conductivity (λ)(W/(m K))	Dynamic Viscosity (η × 10⁻⁶)(Pa s)	Prandtl Number
-25	738	2.064	0.144	1020	14.62
0	719	2.131	0.137	714	11.11

Source: engineeringtoolbox.com

Unit Conversions

Density: $1 \, \text{kg/m}^3 = 0.0624 \, \text{lb/ft}^3$
Specific Heat: $1 \, \text{kJ/(kg·K)} = 0.2389 \, \text{Btu/(lb·°F)}$
Thermal Conductivity: $1 \, \text{W/(m·K)} = 6.935 \, \frac{\text{Btu·in}}{\text{ft}^2·\text{h·°F}}$
Dynamic Viscosity: $1 \, \text{Pa·s} \, (\text{N·s/m}^2) = 10 \, \text{Poise (P)} = 10^3 \, \text{centipoise (cP)}$ $1 \, \text{Pa·s} = 0.1020 \, \frac{\text{kp·s}}{\text{m}^2} = 0.6721 \, \frac{\text{lb}}{\text{ft·s}}$

Interactive Charts

Fuels and Chemicals - Autoignition Temperatures

References

Original Source

Source: engineeringtoolbox.com