Thermal properties of fats and oils. VIII. Specific heats, heats of fusion, and entropy of alpha and beta tung oils

1952 ◽  
Vol 29 (4) ◽  
pp. 155-157 ◽  
Author(s):  
T. L. Ward ◽  
W. S. Singleton ◽  
R. W. Planck

The experiments to be described in the present paper were undertaken in the hope of obtaining data which would throw light on one of the most obscure points of the kinetic theory of gases, namely, the distribution of energy in the molecule. The properties of gases on which the kinetic theory gained its reputation were the constancy of the product of pressure and volume, and the uniformity of the coefficient of expansion. For the explanation of these in the ease of the hypothetical perfect gas no knowledge of the special constitution of the molecule is required, but for most other properties, and especially thermal properties, the kinetic theory fails to explain the facts from want of information concerning the dynamical peculiarities of the molecules of different gases.



1944 ◽  
Vol 21 (10) ◽  
pp. 300-302 ◽  
Author(s):  
A. E. Bailey ◽  
G. D. Oliver


1944 ◽  
Vol 21 (10) ◽  
pp. 293-297 ◽  
Author(s):  
A. E. Bailey ◽  
S. S. Todd ◽  
W. S. Singleton ◽  
G. D. Oliver


2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Rasna Thakur ◽  
N. K. Gaur

We have investigated the bulk modulus and thermal properties of La1-xSmxCoO3 (0≤x≤0.2) at temperatures 1 K≤T≤300 K probably for the first time by incorporating the effect of lattice distortions using the modified rigid ion model (MRIM). The calculated specific heat, thermal expansion, bulk modulus, and other thermal properties reproduce well with the available experimental data, implying that MRIM represents properly the nature of the pure and doped cobaltate. The specific heats are found to increase with temperature and decrease with concentration (x) for the present. The increase in Debye temperature (θD) indicates an anomalous softening of the lattice specific heat because increase in T3-term in the specific heat occurs with the decrease of concentration (x).



1964 ◽  
Vol 17 (1) ◽  
pp. 26 ◽  
Author(s):  
RCL Bosworth ◽  
CM Groden

Heat flow in heat exchange systems, operating at constant pressure, is.considered in relation to the thermodynamical measure of entropy called by Keenan. the availability. The ratio of the maximum attainable mechanical work from two.systems (1) and (2) is shown to be equal to the ratio of the two availabilities or.l:1B1/l:1Bg, and this reasonably approaches unity only when the exchanger involves.countercurrent flow. The temperatures and temperature differences may be plotted against the linear dimension along the exchanger. The temperature difference will pass through one or more stationary values associated with a temperature T*. At such a pivotal point, we may define enthalpies, l:1H;, l:1H; and specific heats (c;, c;) of the two streams in which the following relations hold:



1969 ◽  
Vol 24 (11) ◽  
pp. 1794-1800 ◽  
Author(s):  
E. Gmelin

Abstract The heat capacities of MgO, CaO, SrO, BaO, having NaCl-structure, have been measured with an adiabatic calorimeter capable to measure heat capacities of solids between 1.2 and 340 °K. A mechanical thermal switch is used for specimen cooling and the temperature calibration above 4 °K is performed with a gas thermometer. The values of the specific heats, Cv , are tabulated. The entropies at 273.15 °K are 27.19; 38.3; 51.9; and 66.9 for MgO. CaO, SrO and BaO respectively, in J/mol °K. The accuracy of the measurements is estimated to be better than 0.8% (smoothed curve).



1945 ◽  
Vol 22 (2) ◽  
pp. 39-41 ◽  
Author(s):  
G. D. Oliver ◽  
A. E. Bailey


1945 ◽  
Vol 22 (1) ◽  
pp. 10-13 ◽  
Author(s):  
A. E. Bailey ◽  
M. E. Jefferson ◽  
Florence B. Kreeger ◽  
S. T. Bauer


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