VAPORIZATION OF ALUMINUM PHOSPHIDE.
Scientific rept. 1 May 66-30 Apr 67,
ROME UNIV (ITALY) ISTITUTO DI CHIMICA FISICA ED ELETTROCHIMICA
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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, 2AlPs yields 2Alg P2g. The enthalpy for reaction 1, as calculated by the second and third law method is 261.7 plus or minus 5.9 kcalmole and 254.9 plus or minus 2.1 kcalmole respectively. The second and third law enthalpies for the reaction 2, 4Alg Al2O3s yields 3Al2Og were determined as -10.7 plus or minus 2.0 and -10.5 plus or minus 0.5 kcalmole respectively. The error terms given represent the standard deviation. On the basis of a selected value of 255.0 plus or minus 6.0 kcalmole 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 kcalmole is obtained. Author
- Atomic and Molecular Physics and Spectroscopy