Abstract
The low-temperature adiabatic heat capacity of Sr3MgSi2O8(s) has been measured fromT=(4 to 420) K, yielding forCp° andS° atT=298.15 K the values (257.35±0.60) J·K−1·mol−1and (280.15±0.60) J·K−1·mol−1, respectively. The enthalpy increment function for temperatures above the ambient one has been obtained using high-temperature drop calorimetry measurements fromT=(525 to 910) K. In addition, the standard molar enthalpy of formation has been derived from the standard molar enthalpies of solution in (3.1 mol·dm−3HCl+3.2 mol·dm−3HF)(aq) using an isoperibol solution calorimeter. From these measurements and the auxiliary data, the following value has been obtained: ΔfHm°(298.15 K){Sr3MgSi2O8(s)}=−(4575.3±5.1) kJ·mol−1. A table containing the thermodynamic properties at selected temperatures from (298.15 to 1500) K is provided.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
