An intimate mixture of ferric oxide,`Fe_2O_3` and aluminium, Al is used in solid fuel rockets. Find the fuel value per g

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Q 1117180080.     An intimate mixture of ferric oxide,`Fe_2O_3` and aluminium, Al is used in solid fuel rockets. Find the fuel value per gram and fuel value per cc of the mixture respectively. Heats of formation and densities are as follows: `H_f (Al_2O_3) `= `– 399` kcal/mol,`H_f (Fe_2O_3)` `= – 199` kcal/mol, Density of `Fe_2O_3 = 5.2` g/cc, Density of `Al = 2.7` g/cc
A

`0.62 ` kcal/g, `3.22` kcal/cc

B

`0.62` kcal/g, `3.94 ` kcal/cc

C

`0.93` kcal/g,` 3.94 ` kcal/cc

D

`0.93 ` kcal/g,` 3.22` kcal/cc

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Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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