Related Experiment Video
Updated: May 31, 2026

Reactive Vapor Deposition of Conjugated Polymer Films on Arbitrary Substrates
Published on: January 17, 2018
Vapor pressure of solid polybrominated diphenyl ethers determined via Knudsen effusion method
1Brown University School of Engineering, Providence, Rhode Island, USA. jinxia_fu@brown.edu
Abstract:
Polybrominated diphenyl ethers (PBDEs) are flame retardants used in a variety of consumer products. The solid vapor pressures of BDE 15 and BDE 209 were determined by using the Knudsen effusion method, and the values measured extrapolated to 298.15 K are 3.12 × 10(-3) and 9.02 × 10(-13) Pa, respectively. The enthalpies of sublimation for these compounds have also been estimated by using the Clausius-Clapeyron equation and are 102.0 ± 3.5 and 157.1 ± 3.5 kJ/mol, respectively. In addition, the melting points and enthalpies of fusion were measured by differential scanning calorimetry.
Related Concept Videos
Vapor Pressure
Vapor Pressure Lowering
Vapor Pressure of Fluid
When a liquid is placed in a closed container with a small air space, and the space is evacuated, vapor molecules will...
Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
Adsorption Isotherms II
Osmotic Pressure

