Calibration and test of an aneroid mini-bomb combustion calorimeter

A new mini-bomb combustion calorimeter designed at the University of Lund was improved, installed and calibrated at the University of Porto. This calorimeter is suitable for high precision combustion calorimetry with samples of mass about (10 to 40) mg. The energy equivalent of the calorimeter, ε_cal = (1946.45 ± 0.11) J · K⁻¹, was obtained from 15 independent calibration experiments with benzoic acid SRM 39i. Anthracene, succinic acid, acetanilide, and 1,2,4-triazole were used as test compounds, with excellent agreement with the literature values.

Empty Cell	$-{\mathrm{\Delta }}_{\text{c}}{H}_{\text{m}}^{\circ }$	${\mathrm{\Delta }}_{\text{f}}{H}_{\text{m}}^{\circ }(\text{cr})$
Empty Cell	kJ · mol−1	kJ · mol−1
Anthracene	7062.6 ± 2.1	124.3 ± 2.8
Succinic acid	1490.2 ± 0.7	−941.3 ± 0.9
Acetanilide	4226.2 ± 1.1	−208.2 ± 1.6
1,2,4-Triazole	1326.1 ± 0.4	110.3 ± 0.5
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