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For the reaction , 2A(g)+B(g) to 2D(g),D...

For the reaction , `2A(g)+B(g) to 2D(g),DeltaU^(0)=-10.5kJ and DeltaS^(0)=-44.1J*K^(-1)`. Calculate `DeltaG^(0)` for the reaction and predict whether it may occur spontaneously.

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Verified by Experts

Temperature has not been mentioned in the problem. Here, the calculation has been done by considering temperature as the normal temperature (298K).
For the reaction, `Deltan=2-(2+1)=-1`, so, for this reaction
`DeltaH^(0)=DeltaU^(0)+DeltanRT=-15.5-1xx8.314xx10^(-3)xx298kJ`
`=-12.98kJ`
We know, `DeltaG^(0)=DeltaH^(0)-TDeltaS^(0)`
The positive value of `DeltaG^(0)` indicates that the reaction cannot occur spontaneously.
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