Home
Class 12
CHEMISTRY
The half cell reaction for rusting of ir...

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

A

`-76`

B

`-322`

C

`-161`

D

`-152`

Text Solution

Verified by Experts

The correct Answer is:
B
`E_(cell)^(0)=1.67v`
`DeltaG^(0)=-2xx96.5xx1.67`
Promotional Banner

Topper's Solved these Questions

  • ELECTRO CHEMISTRY

    NARAYNA|Exercise AIEEE & JEE MAIN PREVIOUS|38 Videos

  • ELECTRO CHEMISTRY

    NARAYNA|Exercise NCERT BASED QUESTIONS|8 Videos

  • ELECTRO CHEMISTRY

    NARAYNA|Exercise LEVEL-II(C.W)|61 Videos

  • 15TH GROUP ELEMENTS

    NARAYNA|Exercise EXERCISE - 4 (NCERT EXEMPLERS/HOTs)|27 Videos

Similar Questions

Explore conceptually related problems

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 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 :

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 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.

NARAYNA- ELECTRO CHEMISTRY-LEVEL-III
  1. A galvanic cell is compsed of two hydrogen electrodes, one of which is...

    Text Solution

    |

  2. The following facts have been observed: 2X^(-)+Y(2)rarr2Y^(-)+X(2) ...

    Text Solution

    |

  3. Two weak acid solutions HA(1) and HA(2) with the same concentration an...

    Text Solution

    |

  4. The standard reduction potential for Zn^(2+)//Zn, Ni^(2+)//Ni and Fe^(...

    Text Solution

    |

  5. What will be the emf for the given cell ? Pt|H(2)(g,P(1))|H^(+)(aq)|...

    Text Solution

    |

  6. The negative Zn pole of Daniell cell, sending a constant current throu...

    Text Solution

    |

  7. Given the data at 25^(@)C Ag+I^(-)rarrAgl+e^(-)" "E^(@)=0.152V A...

    Text Solution

    |

  8. In a fuel cell methanol is used as fuel and oxygen gas is used as an o...

    Text Solution

    |

  9. The Gibbs energy for the decomposition of Al(2)O(3) at 500^(@)C is as ...

    Text Solution

    |

  10. The following are some statements about Voltaic cell I) Chemical ene...

    Text Solution

    |

  11. In an electrochemical process, a salt bridge is used:

    Text Solution

    |

  12. During the working of a galvanic cell and with the passage of time : ...

    Text Solution

    |

  13. Following are some of the facts about a dry cell I : It is alos call...

    Text Solution

    |

  14. The following are some statements about electrolysis I) Involves flo...

    Text Solution

    |

  15. For the following cell reaction, Ag | Ag^(+) | AgCl | Cl^(-) | Cl(2) ,...

    Text Solution

    |

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

    Text Solution

    |

  17. The metal that cannot obtained by electrolysis of an aqueous solution ...

    Text Solution

    |

  18. Resistance of 0.2 M solution of an electrolue is 50 Omega. The speci...

    Text Solution

    |

  19. Given E("Cr(2)O(7)^(2-)//Cr^(3+))^(@)=1.33V,E(MnO(4)^(-)//Mn^(2+))^(@)...

    Text Solution

    |

  20. The reduction potential of hydrogen half cell will be negative if :

    Text Solution

    |