VAPORIZATION OF ALUMINUM PHOSPHIDE.
Abstract
The vaporization of aluminum phosphide was investigated over the temperature range of 1270-1800K using the Knudsen effusion method in combination with mass spectrometry. Aluminum phosphide decomposes according to the reaction: (1), 2AlP(s) (yields) 2Al(g) + P2(g). The enthalpy for reaction (1), as calculated by the second and third law method is 261.7 plus or minus 5.9 kcal/mole and 254.9 plus or minus 2.1 kcal/mole respectively. The second and third law enthalpies for the reaction: (2), 4Al(g) + Al2O3(s) (yields) 3Al2O(g); were determined as -10.7 plus or minus 2.0 and -10.5 plus or minus 0.5 kcal/mole respectively. The error terms given represent the standard deviation. On the basis of a selected value of 255.0 plus or minus 6.0 kcal/mole for the enthalpy of reaction (1) and of pertinent literature data the standard heat of aluminium phosphide formation of -28.2 plus or minus 3.2 kcal/mole is obtained. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1968
- Accession Number
- AD0840393
Entities
People
- G. De Maria
- K. A. Gingerich
- V. Piacente
Organizations
- Sapienza University of Rome