Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic investigations of Bi Ni system - Part I

Samui, P.[Pradeep], Agarwal, R.[Renu], Padhi, A.[Anyuna], Kulkarni, S. G.
J. Chem. Thermodyn. 2013, 57, 470-476
ABSTRACT
The Bi Ni system has two intermetallic compounds, Bi0.75Ni0.25 and Bi0.5Ni0.5, which melt peritectically. Enthalpy increments of these compounds were measured using high temperature calorimeters. The enthalpy increment data near their peritectic temperatures were used for determining enthalpies of their decomposition. The most suitable polynomial equations for least square fit of enthalpy increment data were: DT 298:15KHo moBi0:75Ni0:25P=oJ mol 1 P 1/4 8339 p 29:86oT=KP 0:0104oT=KP2 p 1:367 10 5oT=KP3; DT 298:15KHo moBi0:5Ni0:5P=oJ mol 1 P 1/4 5580 p 16:04oT=KP p 0:0139oT=KP2 130616 K=T: The enthalpy of decomposition of Bi0.75Ni0.25 and of Bi0.5Ni0.5 was found to be 3.51 kJ mol 1 at equilibrium temperature 744 K, and 9.22 kJ mol 1 at equilibrium temperature 927 K, respectively. The heat capacities of the compounds were determined using heat flow DSC and fitted into the following most suitable, polynomial equations: Co p;moBi0:75Ni0:25P=oJ K 1 mol 1 P 1/4 28:92 0:0145T=K p 3:05 10 5oT=KP2; Co p;moBi0:5Ni0:5P=oJ K 1 mol 1 P 1/4 20:25 p 0:0208T=K 57660oK=TP2:
Compounds
# Formula Name
1 Bi3Ni bismuth, compd. with nickel(3:1)
2 BiNi bismuth, compd. with nickel(1:1)
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 1
  • Molar enthalpy, kJ/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Drop calorimetry
  • 28
  • POMD
  • 2
  • Molar heat capacity at constant pressure, J/K/mol ; Crystal
  • Temperature, K; Crystal
  • Pressure, kPa; Crystal
  • Crystal
  • Drop calorimetry
  • 1
  • POMD
  • 2
  • Triple point temperature, K ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Air at 1 atmosphere
  • VISOBS
  • 1
  • POMD
  • 2
  • Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2
  • Crystal 2
  • Crystal 1
  • Air at 1 atmosphere
  • Drop calorimetry
  • 1
  • POMD
  • 2
  • Molar enthalpy, kJ/mol ; Crystal 2
  • Temperature, K; Crystal 2
  • Pressure, kPa; Crystal 2
  • Crystal 2
  • Drop calorimetry
  • 14
  • POMD
  • 2
  • Molar enthalpy, kJ/mol ; Crystal 1
  • Temperature, K; Crystal 1
  • Pressure, kPa; Crystal 1
  • Crystal 1
  • Drop calorimetry
  • 29