Home
Class 12
CHEMISTRY
A fuel cell develops an electrical poten...

A fuel cell develops an electrical potential from the combustion of butane at 1 bar and 298 K
`C_4H_(10)(g)+6.5O_2(g)to4CO_2(g)+5H_2O(l), /_\_rG^(@)=-2746kJ//mol`
what is `E^(@)` of a cell?

A

`4.74 V`

B

`0.547 V `

C

`4.37 V `

D

`1.09 V `

Text Solution

Verified by Experts

The correct Answer is:
D
To find n we break the cell reaction into two half cell reactions .
Anode : `13 H_(2) O (l) to 6.5 O_(2) (g) + 26 H^(+) (aq) + 26 e^(-)`
Cathode : `4CO_(2) (g) + 26 H^(+) (aq) + 26 e^- to C_(4) H_(10) (g) + 8 H_(2) O (l)`
`E^(@) = - (Delta G^(@))/(nF) = - ((-2746) xx 1000)/(26 xx 96500) = 1.09 V`
Promotional Banner

Topper's Solved these Questions

  • COORDINATION COMPOUNDS

    DISHA PUBLICATION|Exercise Exercise|122 Videos

  • ENVIRONMENTAL CHEMISTRY

    DISHA PUBLICATION|Exercise Exercise -2 : Concept Applicator|15 Videos

Similar Questions

Explore conceptually related problems

A fuel cell involves combustion of the butane at 1 atm and 298 K C_(4)H_(10)(g)+(13)/(2)O_(2)(g)rarr 4CO_(2)(g)+5H_(2)O(l) DeltaG^(@)=-"2744 kJ/mole" The value of E_("cell")^(@) Report your answer by rounding it upto nearest whole number.

Estimate the enthalpy of combustion of methane in KJ .mol^(-1) CH_(4)(g)+2O_(2)(g)to CO_(2)(g)+2H_(2)O(g)

A fuel cell involves combustion of butane at at 1 atm and 298 K underset((g))(C_4H_(10))+underset((g))(13/2O_2)rarrunderset((g))(4CO_2)+underset((l))(5H_2O) DeltaG^@=-2746"kJ//mol" The value of E_("cell")^@ is nearly ?

What amount of energy (kJ) is released in the combustion of 5.8 of C_(4)H_(10) (g)? 2C_(4)H_(10)(g)+13O_(2)(g)to8CO_(2)(g)+10H_(2)O(1), DeltaH^(@)=-5756kJ

C_(4)H_(10)+(13)/(2)O_(2)(g)rarr4CO_(2)(g)+5H_(2)O(l), DeltaH =- 2878 kJ DeltaH is the heat of……….of butane gas.

DISHA PUBLICATION-ELECTROCHEMISTRY -Exercise
  1. Consider the following equation for an electrochemical cell reaction. ...

    Text Solution

    |

  2. The temperature coefficient of a cell whose operation is based on the ...

    Text Solution

    |

  3. A fuel cell develops an electrical potential from the combustion of bu...

    Text Solution

    |

  4. Given the following cell at 25^(@) C . What will be the potential o...

    Text Solution

    |

  5. The combustion of butane in O(2) at 1 bar and 298K shows a decrease in...

    Text Solution

    |

  6. The emf of the cell, Zn|Zn^(2+) (0.01 M)||Fe^(2+) (0.001 M)|Fe at 29...

    Text Solution

    |

  7. The specific conductance of a saturated solution of silver bromide is ...

    Text Solution

    |

  8. Given the ionic conductance of underset(underset(COO^(c-))(|))(COO^(c-...

    Text Solution

    |

  9. During conductometric titration of 0. 1 MHCl with 1.0 M KOH, which is ...

    Text Solution

    |

  10. What is the amount of chlorine evoled when 2 amperes of current is pas...

    Text Solution

    |

  11. The specific conductance of a 0.1 N KCl solution at 23^(@)C is 0.012 o...

    Text Solution

    |

  12. lambda(ClCH(2)COONa)=224 "ohm"^(-1) cm^(2) " gm eq"^(-1), lambda(Na...

    Text Solution

    |

  13. Calculate Lambda(HO Ac)^(oo) using appropriate molar conductances of t...

    Text Solution

    |

  14. An aqueous solution containing 1M each of Au^(3+),Cu^(2+),Ag^(+),Li^(...

    Text Solution

    |

  15. A 100.0mL dilute solution of Ag^(+) is electrolysed for 15.0 minutes w...

    Text Solution

    |

  16. A 1 M solution of H2SO4 is electrolysed. Select correct statement in r...

    Text Solution

    |

  17. The value of standard hydrogen electrode potential is taken as zero, b...

    Text Solution

    |

  18. Faraday's Law of Electrolysis

    Text Solution

    |

  19. Sodium is made by the electrolysis of a molten mixture of about 40% Na...

    Text Solution

    |

  20. A lead storage battery containing 5.0 L of 1N H(2)SO(4) solution is op...

    Text Solution

    |