| Autor: |
Prosen EJ; Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234., Kilday MV; Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234. |
| Jazyk: |
angličtina |
| Zdroj: |
Journal of research of the National Bureau of Standards. Section A, Physics and chemistry [J Res Natl Bur Stand A Phys Chem] 1973 Mar-Apr; Vol. 77A (2), pp. 179-203. |
| DOI: |
10.6028/jres.077A.011 |
| Abstrakt: |
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 ) soln Δ H r ( 298.15 K ) = - 590.692 ± 0.101 J ⋅ g - 1 = - 34 , 194.1 ± 5.9 cal ⋅ mol - 1 H 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 ) soln Δ H r ( 298.15 K ) = - 590.828 ± 0.193 J ⋅ g - 1 = - 34 , 203.4 ± 11.1 cal ⋅ mol - 1 . |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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