PbSe: enthalpy of formation
7 accepted literature formation-enthalpy value(s) (experimental 6, model 1).
Systems: Pb–Se
Literature values
| Value | Phase as printed | T (K) | Class | Method | System | Source | Location | Quote |
|---|---|---|---|---|---|---|---|---|
| -105 kJ/mol (basis unstated) | PbSe | 298.15 | experimental | Oxygen vessel calorimetry | Pb–Se | [1] Liu 2012 cites ref. 36 | Table IX, p. 8, row 2 report | |
| -100.3 kJ/mol (basis unstated) | PbSe | 298.15 | experimental | EMF measurements | Pb–Se | [1] Liu 2012 cites Shamsuddin 1973 | Table IX, p. 8, row 6 report | |
| -99.5 kJ/mol (basis unstated) | PbSe | 298.15 | experimental | EMF measurements | Pb–Se | [1] Liu 2012 cites ref. 38 | Table IX, p. 8, row 4 report | |
| -99.26 kJ/mol (basis unstated) | PbSe | 298.15 | experimental | Oxide melt drop solution calorimetry | Pb–Se | [1] Liu 2012 cites Deore 2008 doi | Table IX, p. 8, row 1 report | |
| -96.3 kJ/mol (basis unstated) | PbSe | 298.15 | experimental | Direct combination drop calorimetry | Pb–Se | [1] Liu 2012 cites ref. 37 | Table IX, p. 8, row 3 report | |
| -95.1 kJ/mol (basis unstated) | PbSe | 298.15 | experimental | EMF measurements | Pb–Se | [1] Liu 2012 cites ref. 39 | Table IX, p. 8, row 5 report | |
| -99.78 kJ/mol (basis unstated) | PbSe | model | Calculated | Pb–Se | [1] Liu 2012 | Table IX, p. 8, row 7 report |
Uncertainty budget
Components kept separate, in the value's unit (literature SCHEMA.md, UNCERTAINTY_CALIBRATION.md): effective = max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter). The method floor is the robust between-study scatter of the method class in ORCHID (calibrated) or a documented prior; printed values and printed uncertainties are unchanged.
| Value | Unit | Printed | Reading | Method (class, basis) | Composition | Scatter | Conversion | Effective |
|---|---|---|---|---|---|---|---|---|
| -105 | kJ/mol (basis unstated) | 0.5 | 6.4 (solution_reaction_calorimetry, calibrated) | 6.4 | ||||
| -100.3 | kJ/mol (basis unstated) | 0.05 | 9.2 (emf, cleaned_below_threshold) | 9.2 | ||||
| -99.5 | kJ/mol (basis unstated) | 0.05 | 9.2 (emf, cleaned_below_threshold) | 9.2 | ||||
| -99.26 | kJ/mol (basis unstated) | 0.005 | 6.4 (solution_reaction_calorimetry, calibrated) | 6.4 | ||||
| -96.3 | kJ/mol (basis unstated) | 0.05 | 6.4 (solution_reaction_calorimetry, calibrated) | 6.4 | ||||
| -95.1 | kJ/mol (basis unstated) | 0.05 | 9.2 (emf, cleaned_below_threshold) | 9.2 | ||||
| -99.78 | kJ/mol (basis unstated) | 0.005 | 7.8 (model_calculated, calibrated) | 7.8 |
Sources
- Yajun Liu, Zhitao Kang, Guang Sheng, Lijun Zhang, Jiang Wang, Zhaohui Long, Phase Equilibria and Thermodynamic Basis for the Cd-Se and Pb-Se Binary Systems, Journal of Elec Materi 41, 1915-1923 (2012). doi:10.1007/s11664-012-2016-7