Abstract
The high temperature vaporization of Nd 3− x S 4(s) was investigated by the mass loss Knudsen effusion method over the temperature range 1952–2229 K. NdS 1.38 vaporizes congruently according to 1. (I) NdS 1.38( s) = NdS( g) + 0.38 S( g) and 2. (II) NdS 1.38( s) = Nd( g) + 1.38 S( g). The equilibrium partial pressures are as follows: LnP s(atm) = −63 373(±439) T + 15.67(±0.21) ; LnP Nd ( atm) = − 62 802 (± 368) + 15.64(± 0.18); LnP NdS(atm) = − 66285(± 807) T + 17.09 (±0.39) . The second-law thermodynamic values are as follows: ΔH 298 o = 191.6 (±4) cal mol −1, ΔS 298 o = 58.8(±2) cal mol −1 K −1 for reaction (I); ΔH 298 o = 304.5(±4) kcal mol −1, ΔS o 298 = 81.8(±2) cal mol −1 K −1 for reaction (II). The third-law values are as follows: ΔH 298 o = 189.4(±2) kcal mol −1 for reaction (I), ΔH 298 o = 302.3(±2) kcal mol −1 for reaction (II).
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.
