Question

Calculate the change in the enthalpy when 52.0 g of solid chrominium at 25*C and 1 atm pressure is oxidized. (Delta Hf for Cr2O3(s) is -1135 Kj/Mol.)

4Cr(S) +3 O2(g) = 2Cr2O3 (s). 

A. -1135

B. -284 Kj

C. -568 Kj

D. 1135 Kj

E. 568 Kj

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