1.

Determinewhetherthe followingreactionwill bespontaneousor non- spontaneousunderstandard conditions. Zn_((s)) +Cu^(2+) to Zn^(2+) + Cu_((s)) ""DeltaH^(@) =- 219 kJ, DeltaS^(@) =- 21 JK^(-1)

Answer»


SOLUTION :Given : `DeltaH^(@) =- 219 KJ`
`Delta S^(@) =-21 JK^(-1)= 0.021kJK^(-1)`
`Delta G^(@)= ?`
forstandardconditions: Pressure= 1 atm
TEMPERATURE= T = 298 K
`Delta G^(@) = Delta H^(@)= T Delta S^(@)`
`=- 219 - 298 xx (-0.021)`
`=- 219 + 6.258`
`=- 212 .742 kJ`
Since `Delta G lt 0` THEREACTIONIS spontaneous.


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