1) diborane ΔHorxn _____kJ/mol qsurr _____MJ 2) methane ΔHorxn _____kJ/mol qsurr _____MJ 3) hydrazine ΔHorxn _____kJ/mol qsurr _____MJ 4) Which of these compounds offers the best possibility as a rocket fuel, diborane, hydrazine, or methane?
1) diborane ΔHorxn _____kJ/mol qsurr _____MJ 2) methane ΔHorxn _____kJ/mol qsurr _____MJ 3) hydrazine ΔHorxn _____kJ/mol qsurr _____MJ 4) Which of these compounds offers the best possibility as a rocket fuel, diborane, hydrazine, or methane?
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter21: The Chemistry Of The Main Group Elements
Section: Chapter Questions
Problem 120IL
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Among the substances that react with oxygen and that have been considered as potential rocket fuels are diborane [B2H6(g), which produces B2O3(s) and H2O(g)], methane [CH4(g), which produces CO2(g) and H2O(g)], and hydrazine [N2H4(l), which produces N2(g) and H2O(g)].
On the basis of the heat released by 2.26 kg of each substance in its reaction with oxygen, and assuming that thermal energy is the most desirable property in rocket designs, evaluate the possibility of each being used as a rocket fuel. (Hint: Use the Supplemental Data to compute ΔHorxn in kJ/mol, and qsurr in MJ for each fuel. Enter unrounded values.)
1) diborane
ΔHorxn _____kJ/mol
qsurr _____MJ
2) methane
ΔHorxn _____kJ/mol
qsurr _____MJ
3) hydrazine
ΔHorxn _____kJ/mol
qsurr _____MJ
4) Which of these compounds offers the best possibility as a rocket fuel, diborane, hydrazine, or methane?
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