A sample of methylhydrazine (rocket fuel) weighing 1.500 g was ignited in a bomb calorimeter initially at 25.0°C, producing a temperature rise of 10.215 K. Determine the internal energy (∆U) of combustion of methylhydrazine. a) To properly determine the internal energy of combustion methylhydrazine, the calorimeter was first calibrated. A 0.5000 g sample of sucrose (MW 342.296 g/mol)) was ignited under identical conditions and produced a temperature rise of 1.98 K. For sucrose, the internal energy combustion at constant volume, ∆U, is known to be –5616.64 kJ/mol. Calculate the calorimeter constant, in kJ/K. b) Using the calorimeter constant, determine ∆U, in kJ/mol, of combustion of the methylhydrazine (CH₆N₂, MW 46.10 g/mol).
A sample of methylhydrazine (rocket fuel) weighing 1.500 g was ignited in a bomb calorimeter initially at 25.0°C, producing a temperature rise of 10.215 K. Determine the internal energy (∆U) of combustion of methylhydrazine. a) To properly determine the internal energy of combustion methylhydrazine, the calorimeter was first calibrated. A 0.5000 g sample of sucrose (MW 342.296 g/mol)) was ignited under identical conditions and produced a temperature rise of 1.98 K. For sucrose, the internal energy combustion at constant volume, ∆U, is known to be –5616.64 kJ/mol. Calculate the calorimeter constant, in kJ/K. b) Using the calorimeter constant, determine ∆U, in kJ/mol, of combustion of the methylhydrazine (CH₆N₂, MW 46.10 g/mol).
Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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A sample of methylhydrazine (rocket fuel) weighing 1.500 g was ignited in a bomb calorimeter initially at 25.0°C, producing a temperature rise of 10.215 K. Determine the internal energy (∆U) of combustion of methylhydrazine.
a)
To properly determine the internal energy of combustion methylhydrazine, the calorimeter was first calibrated. A 0.5000 g sample of sucrose (MW 342.296 g/mol)) was ignited under identical conditions and produced a temperature rise of 1.98 K. For sucrose, the internal energy combustion at constant volume, ∆U, is known to be –5616.64 kJ/mol. Calculate the calorimeter constant, in kJ/K.
b) Using the calorimeter constant, determine ∆U, in kJ/mol, of combustion of the methylhydrazine (CH₆N₂, MW 46.10 g/mol).
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