ABSTRACT

The energies of combustion for 2-nitrobenzenesulfonamide (cr), 3-nitrobenzenesulfonamide (cr), and 4- nitrobenzenesulfonamide (cr) were determined using a recently described rotating-bomb combustion calorimeter. The condensed phase molar energies of combustion obtained were (3479.2 +- 1.0) kJ mol-1 for 2-nitrobenzenesulfonamide (cr), (3454.2 +- 1.1) kJ mol-1 for 3-nitrobenzenesulfonamide (cr), and (3450.1 +- 1.9) kJ mol-1 for 4-nitrobenzenesulfonamide (cr). From these combustion energy values, the standard molar enthalpies of formation in the condensed phase were obtained as: (341.3 +- 1.3) kJ mol-1, (366.3 +- 1.3) kJ mol-1, and (370.4 +- 2.1) kJ mol-1, respectively. Polyethene bags were used as an auxiliary material in the combustion experiments. The heat capacities and purities of the compounds were determined using a differential scanning calorimeter.

Compounds

#	Formula	Name
1	H2O4S	sulfuric acid
2	CO2	carbon dioxide
3	N2	nitrogen
4	H2O	water
5	O2	oxygen
6	S	sulfur
7	H2	hydrogen
8	C	graphite
9	C6H6N2O4S	2-nitrobenzenesulfonamide
10	C6H6N2O4S	3-nitrobenzenesulfonamide
11	C6H6N2O4S	4-nitrobenzenesulfonamide

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Phase	Method	#Points
POMD	9	Molar enthalpy of transition or fusion, kJ/mol ; Crystal		Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	9	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	9	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	1
POMD	10	Molar enthalpy of transition or fusion, kJ/mol ; Crystal		Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	10	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	10	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	1
POMD	11	Molar enthalpy of transition or fusion, kJ/mol ; Crystal		Crystal Liquid Air at 1 atmosphere	DSC	1
POMD	11	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	11	Molar heat capacity at constant pressure, J/K/mol ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid	Small sample (50 mg) DSC	1
RXND	9 1 2 3 4 5	Specific internal energy of reaction at constant volume, J/g			Rotating bomb calorimetry	1
RXND	10 1 2 3 4 5	Specific internal energy of reaction at constant volume, J/g			Rotating bomb calorimetry	1
RXND	11 1 2 3 4 5	Specific internal energy of reaction at constant volume, J/g			Rotating bomb calorimetry	1
RXND	9 6 7 3 8 5	Molar enthalpy of reaction, kJ/mol			Rotating bomb calorimetry	1
RXND	10 6 7 3 8 5	Molar enthalpy of reaction, kJ/mol			Rotating bomb calorimetry	1
RXND	11 6 7 3 8 5	Molar enthalpy of reaction, kJ/mol			Rotating bomb calorimetry	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Determination of the energies of combustion and enthalpies of formation of nitrobenzenesulfonamides by rotating-bomb combustion calorimetry

Camarillo, E. A., Flores, H.[Henoc]

ABSTRACT