The determination of normal boiling points at high altitudes

1957 ◽  
Vol 34 (9) ◽  
pp. 440 ◽  
Author(s):  
Luis Levy ◽  
Oswaldo E. Proano
Keyword(s):  
High Altitudes ◽  
Boiling Points

Determination of organic substances with different boiling points in aqueous media by capillary gas-liquid chromatography

2009 ◽  
Vol 41 (6) ◽  
pp. 385-390
Author(s):  
E. A. Rogova ◽  
O. A. Roshchina ◽  
T. I. Samsonova ◽  
A. V. Genis
Keyword(s):  
Liquid Chromatography ◽  
Aqueous Media ◽  
Gas Liquid Chromatography ◽  
Organic Substances ◽  
Boiling Points

scholarly journals On the capacity for heat of water between the freezing and boiling points, together with a determination of the mechanical equivalent of heat in terms of the international electrical units.―Experiments by the continuous-flow method of calorimetry performed in the Macdonald Physical Laboratory of McGill University, Montreal

1901 ◽  
Vol 67 (435-441) ◽  
pp. 238-244 ◽  
Keyword(s):  
Specific Heat ◽  
Continuous Flow ◽  
Thermal Capacity ◽  
Boiling Points ◽  
Physical Laboratory ◽  
Complete Work ◽  
Different Temperatures ◽  
Mcgill University ◽  
Continuous Flow Method

At the Toronto meeting of the British Association in 1897, a new method of calorimetry was proposed by Professor Callendar and the author for the determination of the specific heat of a liquid in term of the international electrical units. At the Dover meeting ii September, 1899, some of the general results obtained with the method for water over a part of the range between 0° and 100 were communicated, with a general discussion of the bearing of the experiments to the work of other observers. In the present paper the author gives a summary of the complete work, in the case of water, to determine the thermal capacity at different temperatures between the freezing and boiling points.

EBULLIOMETRY AND THE DETERMINATION OF THE MOLECULAR WEIGHTS OF POLYMERS: PART III. CONSIDERATIONS ON THERMISTOR WHEATSTONE BRIDGES

1959 ◽  
Vol 37 (12) ◽  
pp. 1365-1373 ◽  
Author(s):  
W. R. Blackmore
Keyword(s):  
Atmospheric Pressure ◽  
Background Noise ◽  
Wheatstone Bridge ◽  
Thermistor Bridge ◽  
Molecular Weights ◽  
Boiling Points ◽  
Pure Solvent ◽  
Unbalance Voltage

It is shown that a d-c. thermistor Wheatstone bridge may be used in ebulliometry to measure the small temperature differences which are observed between the boiling points of polymer solutions and the pure solvent. A relationship is derived between the thermistor bridge unbalance voltage and the solute molecular weight, which it is desired to measure. It is shown that a bridge composed of suitably matched thermistors may be made independent of the gross changes in boiling point of both solution and solvent produced by changes in atmospheric pressure. The possibility of the current flowing through the thermistors disturbing the measurements is discussed and in situ measurements of thermistor dissipation and time constants are given. The sensitivity attainable with various thermistor bridges and modern amplifiers at full gain is calculated and shown to be much greater than may be employed with the usual type of ebulliometer. The reason for this is the relatively large background noise (random temperature fluctuations) produced in the ebulliometer by the boiling process itself.

Determination of Density at High Altitudes Using Rayleigh and Raman Scattering of Solar Radiation

2005 ◽  
Author(s):  
John Wise ◽  
Ramesh Sharma ◽  
Christopher Sioris ◽  
Kelly Chance ◽  
E. Richards ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Raman Scattering ◽  
High Altitudes

A Microevaporation Method and Its Application in Determination of Boiling Points of Carboxylic Acids and Esters

Lipid / Fett ◽  
1991 ◽  
Vol 93 (3) ◽  
pp. 112-114
Author(s):  
Anneli Hase ◽  
P. Saikkonen
Keyword(s):  
Carboxylic Acids ◽  
Boiling Points

Apparatus for the determination of the heat of evaporation of liquids of high boiling points

1923 ◽  
Vol 36 (1) ◽  
pp. 303-312 ◽  
Author(s):  
J H Awbery ◽  
Ezer Griffiths
Keyword(s):  
Boiling Points ◽  
Heat Of Evaporation
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