Open AccessAn adiabatic solution calorimeter and measurements of a standard reaction for solution calorimetry
Author(s) -
E.J. Prosen,
Marthada V. Kilday
Publication year - 1973
Publication title -
journal of research of the national bureau of standards. section a. physics and chemistry
Language(s) - English
Resource type - Journals
eISSN - 2376-5704
pISSN - 0022-4332
DOI - 10.6028/jres.077a.011
Subject(s) - calorimeter (particle physics) , calorimetry , reaction calorimeter , adiabatic process , analytical chemistry (journal) , calorimeter constant , standard solution , standard enthalpy of formation , materials science , chemistry , nuclear chemistry , physics , thermodynamics , chromatography , detector , optics
This paper discusses in detail the design, construction, and performance of the vacuum jacketed, adiabatic solution calorimeter which was used for the work in the certification of two NBS Standard Reference Materials for solution calorimetry. As a test for the calorimetric precision the following enthalpies of reaction were measured (referred to the mass or moles of H 2 SO 4 · 8 H 2 O ): H 2 S O 4 ⋅ 8 H 2 O + 2.36 ( N a O H ⋅ 2620 H 2 O ) = ( N a 2 S O 4 ⋅ 0.36 N a O H ⋅ 6193 H 2 O ) solnΔ H r ( 298.15 K ) = - 590.692 ± 0.101 J ⋅ g - 1= - 34 , 194.1 ± 5.9 cal ⋅ mol - 1H 2 S O 4 ⋅ 8 H 2 O + 2.6 ( N a O H ⋅ 714 H 2 O ) = ( N a 2 S O 4 ⋅ 0.6 N a O H ⋅ 1866 H 2 O ) solnΔ H r ( 298.15 K ) = - 590.828 ± 0.193 J ⋅ g - 1= - 34 , 203.4 ± 11.1 cal ⋅ mol - 1.