✦ LIBER ✦
Isobaric heat capacities of micelle formation by 1-methyl-4-n-dodecyl-pyridinium iodide in aqueous solution; Effects of added urea
✍ Scribed by Willem posthumus; Jan B.F.N. Engberts; Koos Bijma; Michael J. Blandamer
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 349 KB
- Volume
- 73-74
- Category
- Article
- ISSN
- 0167-7322
No coin nor oath required. For personal study only.
✦ Synopsis
Over the temperature range horn 303 to 333 K. the enthalpy of micelle formation by I -methyl-4-n-dodecylpyridinium iodide in aqueous solution is exothermic. characterised by an isobaric heat capacity of micelle formation equal to -439 i-IO J K-t mol-t. At 303 K. the critical micellar concentration (2.X v IO-3 mol dm-3) increases when urea, 4 mol kg-t and X mol kg-t is added. Surprisingly. the isobaric heat capacity of micelle formation is unaffected although micelle formation is slightly less exothermic compared to that recorded for aqueous solutions.