HEAT OF FORMATION OF LiAlH4
Abstract
The heat of formation of lithium aluminum hydride (LiAlH4) was determined by measuring the heats of solution of aluminum, lithium, and lithium aluminum hydride in 4N HCl. The heats of solution were found to be: Al = - 128.14 = 0.39 kcal/mole; Li = -67.05 = 0.53 kcal/mole; and LiAlH4 = -168.56 = 1.31 kcal/mole. From these data, the heat of formation of lithium aluminum hydride was calculated to be -26.63 = 0.31 kcal/mole at 25 C. This value differs by 11% from the value of -24.08 = 0.35 kcal/mole as determined by others, which is the value presented in circular 500 NBS. This latter value was the only one found by a search of the literature. The value determined in this work alters any chemical propulsion calculation utilizing this information.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 26, 1963
- Accession Number
- AD0403346
Entities
People
- Ludwig G. Fasolino