Properties of isopentane
Thermophysical properties for isopentane (CAS: 78-78-4). Use the selector below to view properties in different unit systems.
Calculation Conditions
The following state-dependent properties were calculated at these standard conditions.
Temperature
25 °C
Pressure
1.01325 bar
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Open CalculatorIdentification
- AtomsC: 5, H: 12
- CAS78-78-4
- FormulaC5H12
- ID78-78-4
- InChIC5H12/c1-4-5(2)3/h5H,4H2,1-3H3
- InChI KeyQWTDNUCVQCZILF-UHFFFAOYSA-N
- IUPAC Name2-methylbutane
- Molecular Weight (kg)72.1488
- Phasel
- PubChem ID6556
- SMILESCCC(C)C
- Synonyms
Physical Properties
- Acentric factor0.2274
- Critical pressure (bar)33.78
- Critical temperature (°C)187.2
- Critical volume (m³/kmol)0.305717
- Dipole moment0.13
- Melting temperature (°C)-160
- Normal boiling temperature (°C)27.8264
State-dependent Properties
- API gravity94.8487
- Compressibility factor0.00479528
- Density (kg/m³)614.982
- Dynamic viscosity (cP)0.193645
- Enthalpy of vaporization (mass) (kJ)345.454
- Enthalpy of vaporization (molar) (kJ/kmol)2.4924e+4
- Gibbs free energy (kJ/kmol)0
- Joule–Thomson coefficient-3.6047e-7
- Kinematic viscosity3.1488e-7
- Molar enthalpy (kJ/kmol)0
- Molar entropy (kJ/(kmol·K))0
- Molar heat capacity (kJ/(kmol·K))164.058
- Molar volume (m³/kmol)0.117318
- Parachor4.0871e-5
- Poynting correction factor1.00045
- Prandtl number4.32918
- Saturation pressure (bar)0.917928
- Saturation temperature (°C)27.8266
- Solubility parameter1.3832e+4
- Specific enthalpy (kJ)0
- Specific entropy (kJ/kg·K)0
- Specific gravity0.615587
- Specific heat capacity (kJ/kg·K)2.27388
- Surface tension0.0144493
- Thermal conductivity0.101711
- Thermal diffusivity7.2734e-8
Safety Properties
- Autoignition temperature (°C)420
- Flash point temperature (°C)-56
- Lower flammability limit0.013
- Upper flammability limit0.083
Environmental Properties
- Global warming potential
- Ozone depletion potential