EXCESS-ENTHALPIES OF 2-ALKOXYETHANOLS WITH TRICHLOROETHYLENE AND TETRACHLOROETHYLENE AT 298.15 K

Excess enthalpies H-E for binary mixtures of tricholorethylene and tet rachloroethylene with 2-alkoxyethanols at 298.15 K have been measured over the entire range of composition with Parr's 1451 solution calorim eter. The alkoxyethanols were 2-methoxyethanol, 2 ethoxyethanol and 2- butoxyethanol. The H-E values are positive for the systems tetrachloro ethylene + 2-alkoxyethanols, and a change in sign from negative to pos itive is observed for the systems trichloroethylene + 2-alkoxyethanols , The measured excess enthalpies decrease as the chain length of the a lkoxyethanol increases.