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डेनियल सेल के लिए मानक इलेक्ट्रोड विभव का मान `1*1V` है, तो निम्नलिखित अभिक्रिया के लिए मानक गिब्ज़ ऊर्जा का परिकल्पन कीजिय |
`Zn_((s))+Cu_((aq))^(2+)toZn_((aq))^(2+)+CU_((s))`

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`DeltaG^@=-nFE_((सेल))^@`
जहां `n=2, F=96487 C mol^(-1)` एव `E_((सेल))^@=1*1V` है, अतः
`DeltaG^@=-2x1*2Vxx96487 C mol^(-1)`
`=212271*7V mol^(-1)`
या `=-212271*4 J mol^(-1)`
`DeltaG^@=-21*227" KJ mol"^(-1)`

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