Home
Class 12
CHEMISTRY
Thermodynamic efficiency of a cell is gi...

Thermodynamic efficiency of a cell is given by :

A

`DeltaH//DeltaG`

B

`(Nfe)/(DeltaG)`

C

`(-nFE)/(DeltaH)`

D

`nFE^(c-)`

Text Solution

Verified by Experts

The correct Answer is:
c

Thermodynamics efficiency `=(DeltaG)/(DeltaH)=(-nFE)/(DeltaH)`
Promotional Banner

Topper's Solved these Questions

  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Exerciseassertion -Reasoning|25 Videos
  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Exerciseinterger|8 Videos
  • ELECTROCHEMISTRY

    CENGAGE CHEMISTRY ENGLISH|Exercise Exercisemultiple Correct Ansers|53 Videos
  • D AND F BLOCK ELEMENTS

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives Subjective|29 Videos
  • GENERAL PRINCIPLES AND PROCESS OF ISOLATION OF ELEMENTS

    CENGAGE CHEMISTRY ENGLISH|Exercise Archives (Subjective)|14 Videos

Similar Questions

Explore conceptually related problems

The thermodynamic efficiency of cell is given by

The efficiency of a fuel cell is given by:

A fuel cell is a cell that is continously supplied with an oxidant and a reductant so that if can deliver a current indefinitely. Fuel cells offer the possibility of achieving high thermodynamic efficiency in the conversion of Gibbs energy into mechanical work.Internal combustion engines at best convert only the fraction (T_2-T_1)//T_2 of the heat of combustion into mechanical work. While the thermodynamic efficiency of the fuel cell is given by, eta=(DeltaG)/(DeltaH) , where DeltaG is the Gibbs energy change for the cell reaction and DeltaH is the enthalpy change of the cell reaction.A hydrogen-oxygen fuel cell may have an acidic or alkaline electrolyte. Pt|H_2(g)|H^(+)(aq.)||H_2O(l)|O_(2)(g)|Pt , (2.303 RT)/F=0.06 The above fuel cell is used to produce constant current supply under constant temperature & 30 atm constant total pressure conditions in a cylinder.If 10 moles H_2 and 5 moles of O_2 were taken initially. Rate of consumption of O_2 is 10 milli moles per minute. The half-cell reactions are 1/2O_2(g)+2H^+(aq)+2e^(-)toH_2O(l) E^(@)=1.246 V 2H^+(aq)+2e^(-) to H_2(g) E^(@)=0 To maximize the power per unit mass of an electrochemical cell, the electronic and electrolytic resistances of the cell must be minimized.Since fused salts have lower electolytic resistances than aqueous solutions, high-temperature electrochemical cells are of special interest for practical applications. Calculate e.m.f of the given cell at t=0.(log 2=0.3)

The efficiency of a fuel cell is given by: DeltaG//DeltaS , DeltaG//DeltaH , DeltaS//DeltaG , DeltaH//DeltaG

N moles of a monoatomic gas is carried round the reversible rectangular cycle ABCDA as shown in the diagram. The temperature at A is T_0 The thermodynamic efficiency of the cycle is :

N moles of a monotomic gas is carried round the reversible rectangular cycle ABCDA as shown in the diagram. The temperature at A is T_sigma . The thermodynamic efficiency of the cycle is

Thermodynamics deals with

What is the efficiency of a fuel cell? What is the use of fuel cell ?

The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is

The cell constant is given by

CENGAGE CHEMISTRY ENGLISH-ELECTROCHEMISTRY-Exercises Ingle Correct
  1. Which of the following reactions occurs at the anode during the rechar...

    Text Solution

    |

  2. In H(2)-O(2) fuel cell, the reaction occurring at cathode is

    Text Solution

    |

  3. Thermodynamic efficiency of a cell is given by :

    Text Solution

    |

  4. 10800 C of electricity passed through the electrolyte deposited 2.977g...

    Text Solution

    |

  5. In which of the following will the corrosion of iron be most rapid?

    Text Solution

    |

  6. The two Pt electrodes fitted in a conductance cell are 1.5 cm apart wh...

    Text Solution

    |

  7. For a reaction A(s)+2B^(o+) rarr A^(2+)+2B K(c) has been found to be...

    Text Solution

    |

  8. Rust is a mixture of

    Text Solution

    |

  9. Galvanized iron sheets are coated with

    Text Solution

    |

  10. An example of a simple fuel cell is

    Text Solution

    |

  11. For an electrolyte solution of 0.05 mol L^(-1) , the conductivity has...

    Text Solution

    |

  12. How much will the reduction potential of a hydrogen electrode change w...

    Text Solution

    |

  13. If E^(c-).(Fe^(3+)|Fe) and E^(c-).(Fe^(2+)|Fe) are =-0.36 V and -0.439...

    Text Solution

    |

  14. The standard electrode of a metal ion (Ag|Ag^(o+)) and metal - insolu...

    Text Solution

    |

  15. The standard reduction potential at 25 degree Celsius for the reactio...

    Text Solution

    |

  16. What would be the magnitude of EMF of the following cell: at 25^(...

    Text Solution

    |

  17. The rusting of iron takes place as follows : 2H^(o+)+2e^(-) +(1)/(2...

    Text Solution

    |

  18. For the electrolytic production of NaClO(4) from NaClO(3) according to...

    Text Solution

    |

  19. If the specific conductance of 1 M H(2)SO(4) solution is 26xx10^(-2)S ...

    Text Solution

    |

  20. The highest electrical conductivity of the following aqueous solutions...

    Text Solution

    |