At 101.3 kPa and 298 K. what is the total amount of heat released when one mole of aluminum oxide, Al2O3(s), is formed from its elements?(1) 393.5 kJ (2) 837.8 kJ (3) 1676 kJ (4) 3351 kJ

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19-07-2015
Chemistry

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At 101.3 kPa and 298 K. what is the total amount of heat released when one mole of aluminum oxide, Al2O3(s), is formed from its elements?(1) 393.5 kJ (2) 837.8 kJ (3) 1676 kJ (4) 3351 kJ

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lulu1991 lulu1991 · Answer 1 · 2015-07-20T04:46:14+02:00

lulu1991 lulu1991

20-07-2015

The answer is (3) 1676 kJ. The heats of reaction at 101.3 kPa and 298 K for reaction: 4Al(s) +3O2(g)= 2Al2O3(s) is -3351 kJ. So for one mole of aluminum oxide is 3351/2=1676 kJ.

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