Heat of combustion of standard sample benzoic acid

1934 ◽  
Vol 13 (4) ◽  
pp. 469 ◽  
Author(s):  
R.S. Jessup ◽  
C.B. Green
Keyword(s):  
Benzoic Acid ◽  
Standard Sample ◽  
Heat Of Combustion

The absolute heat of combustion of benzoic acid

2010 ◽  
Vol 75 (3) ◽  
pp. 237-253 ◽  
Author(s):  
J. Coops ◽  
N. Adriaanse ◽  
K. van Nes
Keyword(s):  
Benzoic Acid ◽  
Heat Of Combustion ◽  
The Absolute

scholarly journals Influence of the Pyrotechnic Igniter Composition Aging on Explosion Parameters of Dispersed Dusts

2021 ◽  
Vol 11 (22) ◽  
pp. 10728
Author(s):  
Zuzana Szabová ◽  
Richard Kuracina ◽  
Martin Sahul ◽  
Miroslav Mynarz ◽  
Petr Lepík ◽  
...  
Keyword(s):  
Benzoic Acid ◽  
Measurement Accuracy ◽  
Standard Sample ◽  
Barium Nitrate ◽  
Explosion Chamber ◽  
Explosion Pressure ◽  
Lycopodium Clavatum ◽  
Barium Peroxide ◽  
Pyrotechnic Composition

A commercially available pyrotechnic igniter was used according to the EN 14034 and ASTM E1226a Standards to study the explosiveness of dispersed dusts. Its pyrotechnic composition consists of 1.2 g of zirconium (40% wt.), barium peroxide (30% wt.) and barium nitrate (30% wt.). The energy released during the combustion of that amount of composition is 5 kJ. The article investigates the influence of aging of the pyrotechnic composition in the igniter on its initiation parameters. In the study, igniters of different years from date of manufacture were used: Igniter 1, manufactured in 2021 (less than 1 year from date of manufacture), and Igniter 2 (more than 2 years from date of manufacture). The study was performed in the KV 150M2 explosion chamber with a volume of 365 L and the 20 L sphere chamber with a volume of 20 L. A standard sample of Lycopodium clavatum was used in the KV 150M2 explosion chamber. Magnesium and benzoic acid were used as the samples in the 20 L sphere explosion chamber. The experiment showed that the explosion pressure Pmax of the igniter with more than 2 years from date of manufacture decreased by up to 10%, while the value of the explosion constant Kst decreased by up to 40%. The attained results proved that aging of igniters affects their explosion parameters and measurement accuracy.

Heat of Combustion of Benzoic Acid under Thermodynamic Standard Conditions

Nature ◽  
1966 ◽  
Vol 210 (5034) ◽  
pp. 411-412 ◽  
Author(s):  
P. HAWTIN
Keyword(s):  
Benzoic Acid ◽  
Heat Of Combustion

An electrically calibrated bomb calorimeter

1955 ◽  
Vol 247 (936) ◽  
pp. 553-582 ◽  
Keyword(s):  
Benzoic Acid ◽  
Outer Surface ◽  
Standard Error ◽  
Heat Of Combustion ◽  
Bomb Calorimetry ◽  
Bomb Calorimeter ◽  
Effective Boundary ◽  
The Difference

After a review of the physical foundations of bomb calorimetry, a bomb calorimeter is described which can be heated electrically or by combustion. The evaporation of water is prevented by sealing the vessel completely. Other modifications in the normal technique are introduced after consideration of ( a ) the difference in temperature between the outer surface of the calorimeter and the thermometer immersed in it, ( b ) the effective ‘boundary’ of the calorimeter in electrical and combustion experiments, and ( c )variation with temperature of the constants of the apparatus. The heat of combustion of samples from a batch of thermochemical quality benzoic acid is found to be 26436 J/g under ‘standard bomb conditions’. The standard error of the determination, a combination of errors in reproducibility of electrical and combustion experiments and in measurement of the corrections, is estimated to be 2.2 J/g.

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