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Hydrazine and 1,1-dimethylhydrazine both react spontaneously with O2 and can be used as rocket fuels. N2H4 () + O2 (g) N2(g) + 2 H2O(g) N2H2 (CH3 )2 (4) + 4 02 (g) 2 CO2 (g) +4 H2O(g) + N2 (g) The molar enthalpy of formation of N,H4 (e) is +50.6 kJ/mol, and that of N3H2 (CH3)2 () is +48.9 kJ/mol. Use these values, with other A,H values in the table below. Compound H2O(g) CO2 (8) A,H" (kJ/mol) -241.83 -393.509 Calculate the specific heat of the reaction hydrazine with oxygen. A,H - -16.7 V kJ/g hydrazine Correct To calculate molar enthalpy of the reaction, the sum of molar standard enthalpies of formation of reactants should be subtracted from molar standard enthalpies of formation of products: A,H (kJ/mol) = 2 mol x (-241.83 kJ/mol) - 1 mol x x 50.6 kJ/mol =-534.3 kJ/mol Convert the value from (kJ/mol) to (kJ/g): 1 mol (N, H4) 32.05 g (N,H4) A,H (kJ/g) = -534.3 kJ/mol x -16.67 kJ/g b Calculate specific heat of the reaction 1,1-dimethylhydrazine with oxygen. A,H -[ k//g 1,1-dimethylhydrazine Previous Next

Hydrazine and 1,1-dimethylhydrazine both react spontaneously with O2 and can be used as rocket fuels. N2H4 () + O2 (g) N2(g) + 2 H2O(g) N2H2 (CH3 )2 (4) + 4 02 (g) 2 CO2 (g) +4 H2O(g) + N2 (g) The molar enthalpy of formation of N,H4 (e) is +50.6 kJ/mol, and that of N3H2 (CH3)2 () is +48.9 kJ/mol. Use these values, with other A,H values in the table below. Compound H2O(g) CO2 (8) A,H" (kJ/mol) -241.83 -393.509 Calculate the specific heat of the reaction hydrazine with oxygen. A,H - -16.7 V kJ/g hydrazine Correct To calculate molar enthalpy of the reaction, the sum of molar standard enthalpies of formation of reactants should be subtracted from molar standard enthalpies of formation of products: A,H (kJ/mol) = 2 mol x (-241.83 kJ/mol) - 1 mol x x 50.6 kJ/mol =-534.3 kJ/mol Convert the value from (kJ/mol) to (kJ/g): 1 mol (N, H4) 32.05 g (N,H4) A,H (kJ/g) = -534.3 kJ/mol x -16.67 kJ/g b Calculate specific heat of the reaction 1,1-dimethylhydrazine with oxygen. A,H -[ k//g 1,1-dimethylhydrazine Previous Next

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Calculate specific heat of the reaction 1,1-dimethylhydrazine with oxygen.

Hydrazine and 1,1-dimethylhydrazine both react spontaneously with O2 and can be used as rocket fuels. N2H4 () + O2 (g) N2(g) + 2 H2O(g) N2H2 (CH3 )2 (4) + 4 02 (g) 2 CO2 (g) +4 H2O(g) + N2 (g) The molar enthalpy of formation of N,H4 (e) is +50.6 kJ/mol, and that of N3H2 (CH3)2 () is +48.9 kJ/mol. Use these values, with other A,H values in the table below. Compound H2O(g) CO2 (8) A,H" (kJ/mol) -241.83 -393.509 Calculate the specific heat of the reaction hydrazine with oxygen. A,H - -16.7 V kJ/g hydrazine Correct To calculate molar enthalpy of the reaction, the sum of molar standard enthalpies of formation of reactants should be subtracted from molar standard enthalpies of formation of products: A,H (kJ/mol) = 2 mol x (-241.83 kJ/mol) - 1 mol x x 50.6 kJ/mol =-534.3 kJ/mol Convert the value from (kJ/mol) to (kJ/g): 1 mol (N, H4) 32.05 g (N,H4) A,H (kJ/g) = -534.3 kJ/mol x -16.67 kJ/g b Calculate specific heat of the reaction 1,1-dimethylhydrazine with oxygen. A,H -[ k//g 1,1-dimethylhydrazine Previous Next
Transcribed Image Text:Hydrazine and 1,1-dimethylhydrazine both react spontaneously with O2 and can be used as rocket fuels. N2H4 () + O2 (g) N2(g) + 2 H2O(g) N2H2 (CH3 )2 (4) + 4 02 (g) 2 CO2 (g) +4 H2O(g) + N2 (g) The molar enthalpy of formation of N,H4 (e) is +50.6 kJ/mol, and that of N3H2 (CH3)2 () is +48.9 kJ/mol. Use these values, with other A,H values in the table below. Compound H2O(g) CO2 (8) A,H" (kJ/mol) -241.83 -393.509 Calculate the specific heat of the reaction hydrazine with oxygen. A,H - -16.7 V kJ/g hydrazine Correct To calculate molar enthalpy of the reaction, the sum of molar standard enthalpies of formation of reactants should be subtracted from molar standard enthalpies of formation of products: A,H (kJ/mol) = 2 mol x (-241.83 kJ/mol) - 1 mol x x 50.6 kJ/mol =-534.3 kJ/mol Convert the value from (kJ/mol) to (kJ/g): 1 mol (N, H4) 32.05 g (N,H4) A,H (kJ/g) = -534.3 kJ/mol x -16.67 kJ/g b Calculate specific heat of the reaction 1,1-dimethylhydrazine with oxygen. A,H -[ k//g 1,1-dimethylhydrazine Previous Next
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