1.

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

Answer»

`-1238.78 J MOL^(-1)`
`1238.78 mol^(-1)`
`-2477.57 J mol^(-1)`
`2477.57 J mol^(-1)`

Solution :`C(s)+1//2O_(2)(g)rarrCO(g)`
`{:(DeltaH=DeltaU+Deltan_(g)RT),((DeltaH-DeltaU)=Deltan_(g)RT):}}DELTAN=1-(1)/(2)implies+(1)/(2)`
`=+(1)/(2)xx8.314xx298=+1238.78 J mol^(-1)`.


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