The equilibrium constant for N2O5⇄NO2+NO3: Absolute determination by direct measurement from 243 to 397 K

1988 ◽  
Vol 88 (8) ◽  
pp. 4997-5006 ◽  
Author(s):  
C. A. Cantrell ◽  
J. A. Davidson ◽  
A. H. McDaniel ◽  
R. E. Shetter ◽  
J. G. Calvert
Keyword(s):  
Equilibrium Constant ◽  
Direct Measurement ◽  
Absolute Determination

ChemInform Abstract: Equilibrium Constant for N2O5 ⇄ NO2 + NO3: Absolute Determination by Direct Measurement from 243 to 397 K.

ChemInform ◽  
1988 ◽  
Vol 19 (30) ◽  
Author(s):  
C. A. CANTRELL ◽  
J. A. DAVIDSON ◽  
A. H. MCDANIEL ◽  
R. E. SHETTER ◽  
J. G. CALVERT
Keyword(s):  
Equilibrium Constant ◽  
Direct Measurement ◽  
Absolute Determination

Acetal formation from methyl formate, pinacolone, and benzophenone: equilibrium constants in methanol and water determined by a chain of transacetalization equilibria

1994 ◽  
Vol 72 (10) ◽  
pp. 2071-2076 ◽  
Author(s):  
J. Peter Guthrie ◽  
Junan Guo
Keyword(s):  
Equilibrium Constant ◽  
Direct Measurement ◽  
Analytical Method ◽  
Methyl Formate ◽  
Equilibrium Constants ◽  
Systematic Errors ◽  
Methanol Solution ◽  
Diethyl Acetal ◽  
A Chain

Transacetalization equilibrium constants can be measured in methanol solution. This allows a ladder of equilibrium constants to be constructed from acetophenone, for which the equilibrium constant for acetal formation has been measured in methanol, to methyl formate, for which it has not. This is the first direct measurement of an equilibrium constant for formation of an acetal of an acyclic ester. We have also determined equilibrium constants for acetal formation from benzophenone and pinacolone. The value for benzophenone is inconsistent with the value reported for the diethyl acetal by Pfeiffer and Adkins (G.J. Pfeiffer and H. Adkins. J. Am Chem. Soc. 53, 1043 (1931)). We must conclude that their analytical method was subject to systematic errors.

Direct Measurement of the Listening of Hearing-Impaired Children

1970 ◽  
Vol 13 (1) ◽  
pp. 65-73 ◽  
Author(s):  
Mary Mira
Keyword(s):  
Direct Measurement ◽  
Continuous Measurement ◽  
Hearing Impaired ◽  
Reinforcement System ◽  
School Aged Children ◽  
Conjugate Reinforcement ◽  
Impaired Children ◽  
Hearing Impaired Children

Listening, a significant dimension of the behavior of hearing-impaired children, may be measured directly by recording childrens' responses to obtain audio narrations programmed via a conjugate reinforcement system. Twelve hearing-impaired, school-aged children responded in varying ways to the opportunity to listen. Direct and continuous measurement of listening has relevance for evaluation of remediation methods and for discovery of variables potentially related to listening.

DIRECT MEASUREMENT OF TILT ANGLE IN SMECTIC MESOPHASES BY NEUTRON DIFFRACTION

1976 ◽  
Vol 37 (C3) ◽  
pp. C3-127-C3-127 ◽  
Author(s):  
H. HERVET ◽  
S. LAGOMARSINO ◽  
F. RUSTICHELLI ◽  
F. VOLINO
Keyword(s):  
Neutron Diffraction ◽  
Direct Measurement ◽  
Tilt Angle
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