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Q.

∆H-∆U for the formation of carbon monoxide (CO) from its elements at 298 K is (R = 8.314 J K-1mol-1)

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a

2477.57 J mol-1

b

-1238.78 J mol-1

c

1238.78 J mol-1

d

-2477.57 J mol-1

answer is B.

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Detailed Solution

C+12 O2→CO ∴ ∆H-∆U=∆nRT =-12 × 8.314 × =-1238.78 J mol-1

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