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(DeltaH-DeltaU) for the formation of car...

`(DeltaH-DeltaU)` for the formation of carbon monoxide (CO) from its elements at 298 K is `(R=8.314kJ^(-1)" "mol^(-1))`

A

`-1238.78 J mol^(-1)`

B

`1238.78 J mol_(−1)`

C

`-2477.57 J mol_(−1)`

D

`2477.57 J mol_(−1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`C(s) + 1/2O_2 (g) to CO(g)`
`{:(DeltaH = DeltaU + Deltan_gRT),((DeltaH - DeltaU) = Deltan_g RT):}}Deltan = 1 - 1/2 rArr +1/2`
` = + 1/2 xx 8.314 xx 298 = + 1238.78 J mol^(-1)`.
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