Home
Class 12
CHEMISTRY
The standard emf of the cell, Cd(s) |CdC...

The standard emf of the cell, `Cd(s) |CdCI_(2) (aq) (0.1M)||AgCI(s)|Ag(s)` in which the cell reaction is `Cd(s) +2AgCI(s) rarr 2Ag(s) +Cd^(2+) (aq)` is `0.6915 V` at `0^(@)C` and `0.6753V` at `25^(@)C`. The `DeltaH` of the reaction at `25^(@)C` is,-

A

`-176kJ`

B

`-234.7kJ`

C

`+123.5kJ`

D

`-167.26kJ`

Text Solution

Verified by Experts

The correct Answer is:
D
`(dE)/(dT)=((0.6753-0.6915))/((25-0))=-6.48xx10^(-4)Vdeg^(-1)`
`triangleH_(298)=-neF+nFT(dE)/(dT)=-2xx0.6753xx96500+2xx96500xx298xx(-6.48xx10^(-4))`
`=2xx96500(-0.6753-0.1931)=-167.6KJ`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISRY

    RESONANCE ENGLISH|Exercise Assertion Reasoning|11 Videos

  • ELECTROCHEMISRY

    RESONANCE ENGLISH|Exercise Subjective Questions|14 Videos

  • ELECTROCHEMISRY

    RESONANCE ENGLISH|Exercise Board Level Exercise|20 Videos

  • ELECTRO CHEMISTRY

    RESONANCE ENGLISH|Exercise PHYSICAL CHEMITRY (ELECTROCHEMISTRY)|53 Videos

  • EQUIVALENT CONCEPT & TITRATIONS

    RESONANCE ENGLISH|Exercise Part -IV|22 Videos

Similar Questions

Explore conceptually related problems

The EMF of the following cell : Cd(s)|CdCl_(2)(0.10M)||AgCl(s)|Ag(s) is 0.6915V at 0^(@)C and 0.6753V at 25^(@)C . The DeltaH of reaction in kJ at 25^(@)C is

The standard potential of a cell using the reaction +3HgO(s)+2(overset(c-)(O)H) (aq) is 0.489V at 25^(@)C . What is the equilibrium constant of the reaction ?

The value of reaction quotient Q for the cell Zn(s)|Zn^(2+)(0.01M)||Ag^(o+)(1.25M)|Ag(s) is

Select the correct cell reaction of the cell Ag(s)|Ag^+(aq)"||"cu^(2+)(aq)"|"cu(s) :

The equivalent constant of the reaction: Cu(s)+2Ag^(+)(aq.) rarr Cu^(2+)(aq.)+2Ag(s) E^(@)=0.46 V at 298 K ,is:

The EMF of the following cellis 1.05V at 25^(@)C: Pt,H_(2)(g)(1.0 atm)|NaOH(0.1m),NaCl(0.1M)|AgCl(s),Ag(s) Write the cell reaction.

The standard potential of the following cell is 0.23 V at 15^(@)C and 0.21V at 35^(@)C . Pt|H_(2) |HCl(aq) |Agcl (s)|g(s) (i) write the cell reaction . (ii) Calculate DeltaH^(@) and DeltaS^(@) for the cell reaction by assuming that these quantities remain unchanged in the range 15^(@)C to 35^(@)C . (iii) calculate the solubility of AgCl in water at 25^(@)C . Give , the standard reduction potential of the (Ag^(+)(aq) //Ag(s) is 0.80 V at 25^(@) C .

The standard emf for the cell reaction, 2Cu^(+)(aq)toCu(s)+Cu^(2+)(aq) is 0.36V at 298K . The equilibrium constant of the reaction is

Select the correct cell reaction of the cell Pt(s)|Cl_2(g)|Cl^(-)(aq)"||"Ag^+(aq)|Ag(s) :

Write Nernst equation for the reaction: (i) 2Cr(s) +3Cd^(2+)(aq) to 2Cr^(3+) (aq) +3Cd(s)

RESONANCE ENGLISH-ELECTROCHEMISRY-Exercise
  1. Fe is reacted with 1.0 M HCl . E^(0) for Fe//Fe^(2+)=+0.34 volt. The c...

    Text Solution

    |

  2. The temperature coefficient of the emf i.e. (dE)/(dT)=0.00065"volt".de...

    Text Solution

    |

  3. The standard emf of the cell, Cd(s) |CdCI(2) (aq) (0.1M)||AgCI(s)|Ag(s...

    Text Solution

    |

  4. The potential of the Daniel cell, Zn |{:(ZnSO(4)),((1M)):}||{:(CuSO(4)...

    Text Solution

    |

  5. Using the date in the preceding problem, calculate the equilibrium con...

    Text Solution

    |

  6. DeltaG=DeltaH-TDeltaS and DeltaG=DeltaH+T[(d(DeltaG))/(dT)](p), then...

    Text Solution

    |

  7. How many Faradays are needed to reduce 1 mole of MnO(4)^(-) to Mn^(2+...

    Text Solution

    |

  8. 3 Faradays of electricity was passed through an aqueous solution of ir...

    Text Solution

    |

  9. Three moles of electrons are passed through three solutions in success...

    Text Solution

    |

  10. 1 g equivalent of Na metal is formed from electrolysis of fused NaCl. ...

    Text Solution

    |

  11. A current of 2A was passed for 1.5 hours through a solution of CuSO(4)...

    Text Solution

    |

  12. A current of 9.65 ampere is passed through the aqueous solution NaCI u...

    Text Solution

    |

  13. In a electrolytic cell of Ag//AgNO(3)//Ag, when current is passed, the...

    Text Solution

    |

  14. If 0.224 L of H(2)(g) is formed at the cathode of one cell at STP, how...

    Text Solution

    |

  15. Which of the following would have the same O(2) content?

    Text Solution

    |

  16. During discharge of a lead stronge cell the density of sulphuric acid ...

    Text Solution

    |

  17. The cell reaction of a fuel cell is

    Text Solution

    |

  18. When a lead storage battery is discharged,

    Text Solution

    |

  19. The ionization constant of a weak monobasic acid is 25xx10^(-6) while ...

    Text Solution

    |

  20. Which of the following curve represents the variation of lambda(M) wit...

    Text Solution

    |