This page provides supplementary chemical data on n-pentane.
Material Safety Data Sheet
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as eChemPortal, and follow its directions. Mallinckrodt Baker.
Structure and properties
Structure and properties Index of refraction,Lange's Handbook of Chemistry, 10th ed. pp. 1234–1237 nD 1.3575 at 20 °C Abbe number? Dielectric constant,Lange's Handbook of Chemistry, 10th ed. pp. 1289–1376 εr 1.844 ε0 at 20 °C Bond strength ? Bond length ? Bond angle ? Magnetic susceptibility ? Surface tension 18.16 dyn/cm at 0 °C17.03 dyn/cm at 10 °C15.82 dyn/cm at 20 °C14.73 dyn/cm at 30 °C13.66 dyn/cm at 40 °C ViscosityLange's Handbook of Chemistry, 10th ed. pp. 1669–1674 0.2894 mPa·s at 0 °C0.2395 mPa·s at 20 °C0.2200 mPa·s at 30 °C
Thermodynamic properties
Phase behavior Triple point 143.46 K (–128.69 °C), 0.076 Pa Critical point 469.8 K (196.7 °C), 3360 kPa Std enthalpy changeof fusion, ΔfusHo 8.4 kJ/mol Std entropy changeof fusion, ΔfusSo 58.5 J/(mol·K) Std enthalpy changeof vaporization, ΔvapHo 26.200 kJ/mol at 25 °C25.79 kJ/mol at 36.1 °C Std entropy changeof vaporization, ΔvapSo 87.88 J/(mol·K) at 25 °C Solid properties Std enthalpy changeof formation, ΔfHosolid ? kJ/mol Standard molar entropy,Sosolid ? J/(mol K) Heat capacity, cp ? J/(mol K) Liquid properties Std enthalpy changeof formation, ΔfHoliquid –173.5 kJ/mol Standard molar entropy,Soliquid 263.47 J/(mol K) Enthalpy of combustion, ΔcHoliquid –3509 kJ/mol Heat capacity, cp 167.19 J/(mol K) at 25 °C Gas properties Std enthalpy changeof formation, ΔfHogas –146.8 kJ/mol Standard molar entropy,Sogas 347.82 J/(mol K) Enthalpy of combustion, ΔcHogas –3535 kJ/mol Heat capacity, cp 120.07 J/(mol K) at 25 °C
Vapor pressure of liquid P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600 T in °C –76.6 –50.1 –29.2 –12.6 18.5 36.1 58.0 92.4 124.7 164.3 — — Table data obtained from CRC Handbook of Chemistry and Physics 47th ed.
Spectral data
UV-Vis λmax ? nm Extinction coefficient, ε ? IR Major absorption bands2881, 2940, 2965 cm−1 NMR Proton NMR Carbon-13 NMR Other NMR data MS Masses of main fragments
References