Home
Class 12
CHEMISTRY
The rusting of iron takes place as follo...

The rusting of iron takes place as follows `:`
`2H^(o+)+2e^(-) +(1)/(2)O_(2)rarr H_(2)O(l)," "E^(c-)=+1.23V`
`Fe^(2+)+2e^(-) rarr Fe(s)," "E^(c-)=-0.44V`
Calculae `DeltaG^(c-)` for the net process.

A

`-322kJ mol^(-1)`

B

`-161 kJ mol^(-1)`

C

`-152kJ mol^(-1)`

D

`-76 kJ mol^(-1)`

Text Solution

Verified by Experts

(D)Anode : `2OH^(-) rarr H_2O+1//2O_2+2e`,
Cathode : `H^(+)+2e rarr H_2`
Eq. of `O_2` formed = `(9.65xx10xx60xx60)/96500` =0.36
`:.` Mole of `O_2` formed =`0.36/4`= 0.09,
`C_8H_18+(25)/2 O_2 rarr 8CO_2+9H_2O`
`:.` Mole of `C_8H_(18)` = `25/2xx0.09`= `7.2 xx10^(-3)`
`:.V_(C_8H_(18))` = `7.2 xx10^-3xx22400` =161.2 mL
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    MOTION|Exercise EXERCISE -1|43 Videos

  • ELECTROCHEMISTRY

    MOTION|Exercise EXERCISE -2 (LEVEL-1)|41 Videos

  • D-BLOCK ELEMENTS

    MOTION|Exercise Exercise IV Level-II|9 Videos

  • GASEOUS STATE

    MOTION|Exercise EXERCISE-4( LEVEL-II)|19 Videos

Similar Questions

Explore conceptually related problems

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

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 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 rusting of iron takes place as 2H^++2e+1/2O_2rarrH_2O(l),E^@=+1.23V Fe^(2+)+2e rarrFe(s),E^@=-0.44V Thus, DeltaG^@ for the net process is

The half-cell reaction for the corrosion, {:(2H^(+)+,(1)/(2)O_(2)+2e^(-) rarr H_(2)O,,,E_(@) = 123 V),(,Fe^(2+)+2e^(-) rarrFe(s),,,E^(@) = -0.44 V):} Find the Delya G^(@) (in kJ) for the overall reaction :

MOTION-ELECTROCHEMISTRY-EXERCISE-4,II
  1. The rusting of iron takes place as follows : 2H^(o+)+2e^(-) +(1)/(2...

    Text Solution

    |

  2. Calculate the equilibrium constant for the reaction, 2Fe^(3+)+3I^(-)hA...

    Text Solution

    |

  3. Find the solubility product of a saturated solution of Ag(2)CrO(4) in ...

    Text Solution

    |

  4. A gas X at 1 atm is bubbled through a solution containing a mixture of...

    Text Solution

    |

  5. For the electrochemical cell, M|M^(+) ||X^(-)|X, E(M^(+)//M)^(@) = 0.4...

    Text Solution

    |

  6. Copper sulphate solution (250 ML) was electrolyzed using a platinum an...

    Text Solution

    |

  7. The following electrochemical cell has been set up. Pt((I))|Fe^(3+),...

    Text Solution

    |

  8. The reaction 3ClO^(-)(aq)rarrClO(3)^(-)(aq)+2Cl^(-)(aq) an example of ...

    Text Solution

    |

  9. The correct order of equivalent conductance at infinite dilution of Li...

    Text Solution

    |

  10. Saturated solution of KNO3 is used to make "salt bridge" because .

    Text Solution

    |

  11. The standard potential of the following cell is 0.23V at 15^(@)C and 0...

    Text Solution

    |

  12. Standard electrode potential data are useful for understanding the sui...

    Text Solution

    |

  13. In the electrolysis cell, flow of electrons is from

    Text Solution

    |

  14. Two students use same stock solution of ZnSO(4) and a solution of CuSO...

    Text Solution

    |

  15. Zn|Zn^(2+)(a=0.1M)||Fe^(2+)(a=0.01M)|Fe. The emf of the above cell ...

    Text Solution

    |

  16. Find the equilibrium constant at 298K for the reaction, Cu^(2+)(aq) ...

    Text Solution

    |

  17. The half cell reaction for rusting of iron are: 2H^(+)+2e^(-)+(1)/(2...

    Text Solution

    |

  18. (a) Calculate /\G"f"^0 of the following reaction Ag^+(aq)+Cl^(-)(aq)...

    Text Solution

    |

  19. Tollen reagent is used for the detection of aldehydes. When a solution...

    Text Solution

    |

  20. Tollen reagent is used for the detection of aldehydes. When a solution...

    Text Solution

    |

  21. Tollen reagent is used for the detection of aldehydes. When a solution...

    Text Solution

    |