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Fe2O3 s 2Al s Al2O3 2Fe s If the heats of forma... - JAMB Chemistry 1990 Question

Fe2O3(s) + 2Al(s) → Al2O3 + 2Fe(s) If the heats of formation of Al2O3 and Fe2O3 are - 1670 kj mol-1 and - 822 kj mol-1 respectively, the enthalpy change in kj for the reaction is ?
A
+2492
B
+848
C
-848
D
-2492
correct option: c
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