The Transition Point of Carbon Tetrachloride as a Fixed Point in Thermometry. The Melting Point. Heats of Transition and of Fusion

1934 ◽  
Vol 56 (1) ◽  
pp. 31-35 ◽  
Author(s):  
Herrick L. Johnston ◽  
Earl A. Long
Keyword(s):  
Fixed Point ◽  
Melting Point ◽  
Carbon Tetrachloride ◽  
Transition Point

A melting-point-of gallium apparatus for thermometer calibration.

1978 ◽  
Vol 24 (8) ◽  
pp. 1331-1334 ◽  
Author(s):  
H E Sostman ◽  
K A Manley
Keyword(s):  
Fixed Point ◽  
Melting Point ◽  
Enzyme Reaction ◽  
Temperature Dependent ◽  
Biological Assays ◽  
Equilibrium Melting Point ◽  
Thermistor Temperature ◽  
Thermometer Calibration ◽  
Melting Point Of Gallium ◽  
Temperature Plateau

Abstract We have investigated the equilibrium melting point of gallium as a temperature fixed-point at which to calibrate small thermistor thermometers, such as those used to measure temperature in enzyme reaction analysis and other temperature-dependent biological assays. We have determined that the melting temperature of "6N" (99.999% pure) gallium is 29.770 +/- 0.002 degrees C, and that the constant-temperature plateau can be prolonged for several hours. We have designed a simple automated apparatus that exploits this phenomenon and that permits routine calibration verification of thermistor temperature probes throughout the laboratory day. We describe the physics of the gallium melt, and the design and use of the apparatus.

New Approach in Filling of Fixed-Point Cells: Case Study of the Melting Point of Gallium

2008 ◽  
Vol 29 (1) ◽  
pp. 119-125 ◽  
Author(s):  
J. Bojkovski ◽  
M. Hiti ◽  
V. Batagelj ◽  
J. Drnovšek
Keyword(s):  
Fixed Point ◽  
Melting Point ◽  
New Approach ◽  
Melting Point Of Gallium

scholarly journals The Specific Heat of Ag2S in ɑ-phase

1985 ◽  
Vol 40 (10) ◽  
pp. 986-988 ◽  
Author(s):  
Hideo Okazaki ◽  
Akio Takano
Keyword(s):  
Heat Capacity ◽  
Melting Point ◽  
Specific Heat ◽  
Room Temperature ◽  
Transition Point ◽  
Lattice Heat Capacity ◽  
Normal Lattice ◽  
Schottky Type ◽  
Mobile Ions ◽  
Lattice Heat

The specific heat of Ag2S has been measured from room temperature up to the melting point (838 °C). The temperature dependence of the specific heat of its ɑ-phase in the temperature range from the β-ɑ. transition point at 179 °C to 586 °C, at which temperature there occurs another crystallographic transition, is well reproduced by supposing a Schottky-type specific heat (excitation of mobile ions) in addition to the normal lattice heat capacity. The latent heat of the latter transition, where the structure of the lattice changes from bcc to fcc, is obtained to be 774 J/mol.

scholarly journals On the Phase Relations of Carbon Tetrachloride below Its Melting Point

1967 ◽  
Vol 40 (4) ◽  
pp. 1018-1018 ◽  
Author(s):  
Kayako Kotake ◽  
Nobuo Nakamura ◽  
Hideaki Chihara
Keyword(s):  
Melting Point ◽  
Carbon Tetrachloride ◽  
Phase Relations
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