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

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.

Aneroid bomb calorimeter for determining the heat of combustion of thermochemical standard benzoic acid

1960 ◽  
Vol 256 (1286) ◽  
pp. 384-399 ◽  
Keyword(s):  
Benzoic Acid ◽  
Standard Error ◽  
Heat Of Combustion ◽  
Bomb Calorimeter ◽  
The Ideal

An electrically calibrated bomb calorimeter is described which has no stirred water, and is mounted in an evacuated outer jacket. Its departures from the ideal are investigated. The heat of combustion of samples from a batch of specially pure benzoic acid is found to be 26431·7 J/g under ‘standard bomb conditions’, with an estimated standard error of 2·2 J/g. This result is compared with those of conventional calorimeters. Considerably less time per determination is needed with the new calorimeter than with a typical conventional calorimeter.

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