The standard molar atomization enthalpy and the standard molar enthalpy of formation of gaseous Si2N from high-temperature mass spectrometry

1995 ◽  
Vol 27 (12) ◽  
pp. 1303-1311 ◽  
Author(s):  
R. Viswanathan ◽  
R.W. Schmude Jr. ◽  
K.A. Gingerich
Keyword(s):  
Mass Spectrometry ◽  
High Temperature ◽  
Enthalpy Of Formation ◽  
Molar Enthalpy ◽  
Standard Molar Enthalpy ◽  
Atomization Enthalpy ◽  
High Temperature Mass Spectrometry

Thermochemistry of uranium compounds. XVI. Calorimetric determination of the standard molar enthalpy of formation at 298.15 K, low-temperature heat capacity, and high-temperature enthalpy increments of UO2(OH2)•H2O (schoepite)

1988 ◽  
Vol 66 (4) ◽  
pp. 620-625 ◽  
Author(s):  
I.R. Tasker ◽  
P. A. G. O'Hare ◽  
Brett M. lewis ◽  
G. K. Johnson ◽  
E. H. P. Cordfunke
Keyword(s):  
Heat Capacity ◽  
High Temperature ◽  
Low Temperature ◽  
Thermodynamic Properties ◽  
Enthalpy Of Formation ◽  
Molar Heat Capacity ◽  
Temperature Drop ◽  
Molar Enthalpy ◽  
Standard Molar Enthalpy ◽  
Enthalpy Increments

Three precise calorimetric methods, viz., low-temperature adiabatic, high-temperature drop, and solution-reaction, have been used to determine as a function of temperature the key chemical thermodynamic properties of a pure sample of schoepite, UO2(OH)2•H2O. The following results have been obtained at the standard reference temperature T = 298.15 K: standard molar enthalpy of formation [Formula: see text] molar heat capacity [Formula: see text] and the standard molar entropy [Formula: see text] The molar enthalpy increments relative to 298.15 K and the molar heat capacity are given by the polynomials: [Formula: see text] and [Formula: see text], where 298.15 K < T < 400 K. The present result for [Formula: see text] at 298.15 K has been combined with three other closely-agreeing values from the literature to give a recommended weighted mean [Formula: see text] from which is calculated the standard Gibbs energy of formation [Formula: see text] at 298.15 K. Complete thermodynamic properties of schoepite are tabulated from 298.15 to 423.15 K.

Vaporization and thermodynamics of the Cs 2 O‐MoO 3 system studied by high temperature mass spectrometry

2021 ◽  
Author(s):  
Valentina L. Stolyarova ◽  
Viktor A. Vorozhtcov ◽  
Sergey I. Lopatin ◽  
Sergey M. Shugurov ◽  
Elizaveta P. Simonenko ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
High Temperature ◽  
High Temperature Mass Spectrometry
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