Standard enthalpies of formation of lanthanum gallides by high temperature reaction calorimetry
作者:R. Babu、K. Nagarajan、V. Venugopal
DOI:10.1016/s0925-8388(00)01459-6
日期:2001.3
The standard enthalpies of formation (Delta H-f(298.15)0) of La5Ga3, LaGa and LaGa2 at 298.15 were determined by high temperature liquid gallium solution calorimetry to be -62.6+/-4.5, -74.8+/-3.7 and -69.0+/-3.7 kJ gatom(-1) respectively. The enthalpy of formation of LaxGa1-x where. x=0.19 at 1125 K was determined by using precipitation calorimetry, to be -37.5+/-3.7 kJ gatom(-1). The partial enthalpy of solution of lanthanum in liquid gallium at infinite dilution (Delta(H) over bar (infinity)(La)) at 1099 K was determined to be -167.9+/-6.8 kJ gatom(-1). (C) 2001 Elsevier Science B.V. All rights reserved.