Values are given for liquid at 25 o C /77 o F / 298 K and 1 bara, if not other phase, temperature or pressure given.
For full table with Imperial Units - rotate the screen!
|Critical density||3.22||mol/dm 3||232||kg/m 3||0.450||slug/ft 3||14.5||lb/ft 3|
|Critical pressure||3.36||MPa=MN/m2||33.6||bar||33.2||atm||487||psi=lbf/in 2|
|Critical volume||311||cm 3 /mol||0.00431||m 3 /kg||2.22||ft 3 /slug||0.0690||ft 3 /lb|
|Density||8606||mol/m 3||620.9||kg/m 3||1.205||slug/ft 3||38.76||lb/ft 3|
|Flammable, gas and liquid||yes|
|Gas constant , individual, R||115.2||J/kg K||0.03201||Wh/(kg K)||689.1||[ft lb f /slug °R]||21.42||[ft lb f /lb °R]|
|Gibbs free energy of formation (gas)||-8||kJ/mol||-111||kJ/kg||-48||Btu/lb|
|Heat (enthalpy) of combustion (gas)||-3535||kJ/mol||-48996||kJ/kg||-21.1||Btu/lb|
|Heat (enthalpy) of combustion (liquid)||-3509||kJ/mol||-48636||kJ/kg||-20.9||Btu/lb|
|Heat (enthalpy) of formation (gas)||-147.0||kJ/mol||-2037||kJ/kg||-876||Btu/lb|
|Heat (enthalpy) of formation (liquid)||-173||kJ/mol||-2398||kJ/kg||-1031||Btu/lb|
|Heat (enthalpy) of fusion at -202 °F/-130°C||8.4||kJ/mol||116||kJ/kg||50.05||Btu/lb|
|Heat (enthalpy) of sublimation, at -202°F/-130°C||42||kJ/mol||582||kJ/kg||250||Btu/lb|
|Heat (enthalpy) of evaporation||26.4||kJ/mol||366||kJ/kg||157||Btu/lb|
|Heat capacity , Cp (gas)||120.0||J/mol K||1.66||kJ/kg K||0.397||Btu/lb°F or cal/g K|
|Specific heat, Cp (liquid)||168.0||J/mol K||2.33||kJ/kg K||0.556||Btu/lb°F or cal/g K|
|Specific heat, Cv (liquid)||125.0||J/mol K||1.73||kJ/kg K||0.414||Btu/lb°F or cal/g K|
|log K OW (Octanol/Water Partition Coefficient)||3.39|
|Solubility in water, at 25°C||0.038||mg/ml|
|Specific Gravity (gas) (relativ to air)||2.48|
|Specific Gravity (liquid) (relativ to water)||0.63|
|Specific Heat Ratio (gas) - C P /C V||1.09|
|Specific Heat Ratio (liquid) - C P /C V||1.34|
|Specific Volume||0.0001162||m 3 /mol||0.0016106||m 3 /kg||0.8300514||ft 3 /slug||0.0257988||ft 3 /lb|
|Standard molar entropy , S° (gas)||348||J/mol K||4.82||kJ/kg K||1.15||Btu/lb °F|
|Standard molar entropy, S° (liquid)||263||J/mol K||3.65||kJ/kg K||0.87||Btu/lb °F|
|Thermal Conductivity||0.111||W/m°C||0.064135||Btu/hr ft °F|
|Triple point pressure||7.63*10 -8||MPa=MN/m 2||7.63*10 -7||bar||7.53*10 -7||atm||1.11*10 -5||psi=lbf/in 2|
|Triple point temperature||143.5||K||-129.7||°C||-201.46||°F|
|Vapor (saturation) pressure||0.0685||MPa=MN/m 2||514.0||mm Hg||0.6762||atm||9.94||psi=lbf/in 2|
|Viscosity , dynamic (absolute)||0.2224||cP||149.4||[lb m /ft s*10 -6 ]||4.64||[lbf s/ft 2 *10 -6 ]|
|Viscosity, kinematic||0.358||cSt||3.9||[ft 2 /s*10 -6 ]|
Density of pentane with varying temperature and pressure
See also more about atmospheric pressure , and STP - Standard Temperature and Pressure & NTP - Normal Temperature and Pressure ,
as well as Thermophysical properties of: Acetone , Acetylene , Air , Ammonia , Argon , Benzene , Butane , Carbon dioxide , Carbon monoxide , Ethane , Ethanol , Ethylene , Helium , Hydrogen , Hydrogen sulfide , Methane , Methanol , Nitrogen , Oxygen , Propane , Toluene , Water and Heavy water, D 2 O .
Pentane is a liquid at standard conditions. However, if heated above 36°C/97°F it becomes a gas, and when cooled it becomes a solid. The phase diagram for pentane shows the phase behavior with changes in temperature and pressure. The curve between the critical point and the triple point shows the pentane boiling point with changes in pressure. It also shows the saturation pressure with changes in temperature.
At the critical point there is no change of state when pressure is increased or if heat is added.
The triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.
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Online calculator, figures and table showing density and specific weight of pentane, C5H12, at temperatures ranging from -130 to 325 °C (-200 to 620 °F) at atmospheric and higher pressure - Imperial and SI Units.
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