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The potential of the Daniell cell, Zn|...

The potential of the Daniell cell,
`Zn|(ZnSO_4),((1M))||(CuSO_4),((1M))|Cu` was reported by Buckbee, Surdzial, and Metz at `E^@ = 1 . 1028 - 0. 41 xx 10^(-3) T + 0. 72 xx 10^(-5) T^2` where T is the Celsius temperature. Calculate `Delta S^@` for the cell reaction at `235^@ C`,.

A

` - 45 . 32`

B

` - 34. 52`

C

` - 25 . 43`

D

` - 55. 39 `

Text Solution

Verified by Experts

The correct Answer is:
D
`(dE^@)/(dT)=- 0.647 xx 10^(-3) + 2 xx 0. 72 xx 10^(-5) T`
`Delta S = 2 xx 96500 xx [-0.647 xx 10^(-3) +2 xx 0. 72 10^(-5) xx 250]`
` =- 55 . 39`.
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The potential of the Daniel cell, Zn |(ZnSO_(4))||(CuSO_(4)|Cu was reported by Buckbee, Surdzial and Metz as E^(@) = 1.1028 - 0.641 xx 10^(-3)T + 0.72 xx 10^(-5)T^(2) , where T is the temperature in degree celcius, Calcualte DeltaS^(@0 for the cell reaction at 25^(@)C .

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