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लोहे पर जंग लगने के दौरान निम्नलिखित अभि...

लोहे पर जंग लगने के दौरान निम्नलिखित अभिक्रियाएँ होती हैं:
`2H^(+)+2e+(1)/(2)O_(2)to H_(2)O, E^(@)= +1.23V`
`Fe^(2+) +2e to Fe(s)E^(@)=0.44V`
निम्नलिखित सम्पूर्ण प्रक्रम के लिए `DeltaG^(@)(kJ)` के परिमाण की गणना कीजिए।
`Fe(s)+2H^(+)+(1)/(2)O_(2) to Fe^(2+) +H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
B, C
`Fe(s) to Fe^(2+) +2e^(-) , DeltaG_(1)^(@)`
`2H^(+) +2e^(-) +(1)/(2)O_(2) to H_(2)O (l), DeltaG_(2)^(@)\\`
`Fe(s) +2H^(+)+(1)/(2)O_(2) to Fe^(2+) +H_(2)O, DeltaG_(3)^(@)`
`DeltaG_(1)^(@)+DeltaG_(2)^(@)=DeltaG_(3)^(@)` प्रयोग करने पर,
`DeltaG_(3)^(@)=(-2F xx 0.44) +(-2F xx 1.23)`
`DeltaG_(3)^(@)=(-2xx96500xx0.44)+(-2xx96500xx1.23)`
`DeltaG_(3)^(@)= -322310J`
`:.DeltaG_(3)^(@)= -322kJ`
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The following reaction occurs during rusting of iron 2H^(+)+2e+(1)/(2)O_(2)rarrH_(2)O,E^(@)=+1.23V Fe^(2+)+2erarr Fe(s), E^(@)=0.44V Calculate magnitude of DeltaG^(@)(kJ) for the net process Fe(s)+2H^(+)+(1)/(2)O_(2)rarrFe^(2+)+H_(2)O

The half cell reactions for rusting of iron are : 2H^(+) + 2e^(-) + (1)/(2)O_(2) rightarrow H_(2)O (l) , E^(@) = +1.23V Fe^(2+) + 2e^(-) + (1)/(2)rightarrow H_(2)O_(2) ((l)) , E^(@) = -0.44V Delta^(@) ((inKJ) for the reaction is : Fe+2H^(+) + (1)/(2) O_(2)rightarrow Fe^(+2)+ H_(2) O ((l))

The half cell reaction for rusting of iron are: 2H^(+)+2e^(-)+(1)/(2)O_(2)rarrH_(2)O(l), E^(@)=+1.23V Fe^(2+)+2e^(-)rarrFe(s), E^(@)=-0.44V DeltaG^(@) (in KJ) for the reaction is