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298 K पर निम्नलिखित अर्ध-सेल अभिक्रियाओं...

298 K पर निम्नलिखित अर्ध-सेल अभिक्रियाओं के लिए मानक विभव दिए गए हैं,
`Cu^(+)(aq) + e^(-) to Cu (s) l E^@ = 0.52 V`
`Cu^(2+)(aq) + e^(-) to Cu^(+)(aq), E^(@) = 0.16 V`
अभिक्रिया, `[2Cu^(+)(aq) to Cu(s) + Cu^(2+)]` के लिए `DeltaG^(@) (kJ)`की गणना कीजिए।

A

`-34.740`

B

`-65.720`

C

`-69.480`

D

`-131.440`

Text Solution

Verified by Experts

The correct Answer is:
A

`Cu^(+) + e^(-) to Cu, E^(@) = 0.52 V`
`DeltaG_1 = -nFE^(@) = -1 xx 96500 xx 0.52 " "….(i)`
`Cu^(2+) + e^(-) to Cu^(+) , E^(@) = 0.16 V`
या `Cu^(+) to Cu^(2+) + e^(-) , E^(@) = -0.16 V`
`DeltaG_2 = -1 xx 96500 xx (-0.16) " "…(ii)`
समीकरण (i) और (ii) को जोड़ने पर , हम प्राप्त करते है
`2Cu^(+) to Cu + Cu^(2+)` ,
`DeltaG = DeltaG_1 + DeltaG_2`
`= (-96500 xx 0.52) + (96500 xx 0.16)`
`= 96500 (-0.52 + 0.16)`
`= -(96500 xx 0.36)`
`= -34740J = -34.740 kJ`
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