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Predict whether the reaction is feasib...

Predict whether the reaction is feasible or not`Al_(2)O_(3)+2Cr rarr Cr_(2)O_(3)+2Al," at 1773K, " Delta_(f)G_(("Al,Al"_(2))O_(3))^(@)=-"900kJ. Mol"^(-1) and Delta_(f)G_(("Cr, Cr"_(2)O_(3)))^(@)=-"500kJ.mol"^(-1)`

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An intimate mixture of ferric oxide, (Fe_(2)O_(3)) and aluminium, (Al) is used in solid fuel rockets. Calculate the fuel value per gram and fuel value per cc of the mixture. Heats of formation and densities are as follows : Delta H_(f)^(0)(Al_(2)O_(3))= 399 " kcal mol"^(-1), Delta H_(f)^(0)(Fe_(2)O_(3))= 199 " kcal mol"^(-1) , Density of Fe_(2)O_(3)= 5.2 g// c c , Density of Al= 2.7g// c c .

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Knowledge Check

  • Balance the reaction Al+O_2 rarr Al_2O

    A
    `4AL+3O_2 rarr 2Al_2O_3`
    B
    `AL_2+4O_2 rarr 3Al_2O_4`
    C
    `4Al+3O_4 rarr 2Al_2O_2`
    D
    `4Al+4O_3 rarr 4Al_2O_4`

  • Which of the following is amphoteric oxide ? Mn_(2)O_(7), CrO_(3), Cr_(2)O_(3), CrO, V_(2)O_(5), V_(2)O_(4)

    A
    `V_(2)O_(5), Cr_(2)O_(3)`
    B
    `Mn_(2)O_(7), CrO_(3)`
    C
    `CrO, V_(2)O_(5)`
    D
    `V_(2)O_(5), V_(2)O_(4)`