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Aluminum is made by thermally decomposing bauxite (Al2O3) into its constituent elements, based on the reaction...

Aluminum is made by thermally decomposing bauxite (Al2O3) into its constituent elements, based on the reaction below. How much energy is required to produce grams of aluminum?

Al2O3(s)---> 2Al(s)+ 3/2O2(g)   (delta) Hrxn=1676J

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Answer #1

Answer. From the given equation we can say 2 moles of aluminium is produced by using 1676 J of energy.

       this means 1676 J of energy is sufficient to produce 54 grams of aluminium.

1676 /54 =31.04 J of energy is required toproduce one gram of aluminium.

31.04x2 =62.07 J is energy is required to produce grams of aluminium.

27x31.04 =838.08 J energy is required toproduce 27 grams of aluminium.

31.04 x100=3104Jenergy is required toproduce hundred grams of aluminium.

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