Home
Class 12
CHEMISTRY
A fuel cell involves combustion of metha...

A fuel cell involves combustion of methane at 1atm and 298 K
`CH_(4(g))+2O_(2)toCO_(2(g))+2H_(2)O_((l)),DeltaH^(@)=-890kJ`.Calculate the efficiency `(E_("cel")^(@)=1.09V)`

A

0.94

B

0.85

C

0.74

D

0.58

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • REDOX REACTION & ELECTROCHEMISTRY

    BRILLIANT PUBLICATION|Exercise QUESTION (ELECTROCHEMISTRY) (LEVEL -II) (ASSERTION-REASON)|3 Videos

  • REDOX REACTION & ELECTROCHEMISTRY

    BRILLIANT PUBLICATION|Exercise QUESTION (ELECTROCHEMISTRY) (LEVEL -I) (HOMEWORK)|20 Videos

  • POLYMERS, BIOMOLECULES AND CHEMISTRY IN EVERYDAY LIFE

    BRILLIANT PUBLICATION|Exercise LEVEL -III (Comprehension Type) |12 Videos

  • SOLID STATE

    BRILLIANT PUBLICATION|Exercise LEVEL-3 (Linked Comprehension Type)|10 Videos

Similar Questions

Explore conceptually related problems

A fuel cell involves combustion of butane at 1 atm and 298 K C_(4)H_(10 )(g)13/2 O_(2) (8)rarr 4CO_(2)(g)+5H_(2)0 (l), triangle G^(@) = -2746 kJ/mol. What is E^(@) of a cell?

The mole concept helps in handling a large number of atoms and molecules in stoichiometric calculations. Calculate the amount of CO_2 formed by the complete combustion of 80 g of methane as per the reaction CH_(4(g))+2O_(2(g))rarrCO_(2(g))2H_2O_((g)) (Atomic masses: C = 12.01u, H = 1.008u, O=16u)..

The mole concept helps in handling a large number of atoms and molecules in stoichiometric calculations. Calculate the amount of carbon dioxide formed by the complete combustion of 80 g of methane as per the reaction: CH_(4(g)) + 2O_(2(g)) rarr CO_(2(g)) + 2H_2O_(g) (Atomic masses : 12.01 u, H = 1.008 u, O = 16u)

A cylinder of cooking gas is assumed to contain 14.2 kg butane (C_(4)H_(10)) combustion of butane is C _(4) H _(10 (g)) + (13)/(2) O _(2 (g)) to 4CO _(2 (g)) + 5 H _(2) O _((l)) , Delta H =- 1660 kJ If a family needs 14000 kJ of energy per day for cooking and assuming that 20% of the gas is wasted due to incomplete combustion, how long would the cylinder last?

The balanced chemical equation for combustion of CH_4 is CH_4(g) + 2O_2(g) -- CO_(2(g)) + 2H_2O (l) Calculate the amount of water formed by the combustion of 32g of CH_4 ?

The following thermochemical equations represent combustion of ammonia and hydrogen: 4 NH_3(g)+3 O_2(g) rarr 6H_2 O(l)+2 N_2(g) , Delta H=-1516 k J 2 H_2(g)+O_2(g) rarr 2 H_2 O(l) , Delta H=-572 kJ Calculate enthalpy of formation of ammonia.

BRILLIANT PUBLICATION-REDOX REACTION & ELECTROCHEMISTRY-QUESTION (ELECTROCHEMISTRY) (LEVEL -II)
  1. When a Galvanic cell produce current by a spontaneous reaction

    Text Solution

    |

  2. A cell contains two copper electrodes. The negative electrode is in co...

    Text Solution

    |

  3. The emf of the cell Pt, underset(1atm)(H(2(g)))|underset(.01M)(HA)||un...

    Text Solution

    |

  4. For the cell Zn|Zn^(2+)(0.01M)||M((0.001M))^(2+)|M,E("cell")=0.29V. Wh...

    Text Solution

    |

  5. Pt,H(2) (1bar)|HCl(aq)|AgCl(s)|Ag has cell potential 0.92V at 25^(@)C ...

    Text Solution

    |

  6. The equilibrium constant of the reaction 2Fe^(3+)+2I^(-)to2Fe^(2+)+I(2...

    Text Solution

    |

  7. Which of the following is/are true a.Specific conductance denotes co...

    Text Solution

    |

  8. Molar conductivity of a 0.01 M solution of a weak monobasic acids HA i...

    Text Solution

    |

  9. 0.025 M aq. Solution of methanoic acid has molar conductivity 46 S. cm...

    Text Solution

    |

  10. From the following molar conductivities at infinite dilution lamda(m...

    Text Solution

    |

  11. Ionisation constant of acetic acid is 2xx10^(-6). Molar conductivity o...

    Text Solution

    |

  12. 0.04M solution of a weak dibasic acid is 4.23xx10^(-4)S.cm^(-1) The de...

    Text Solution

    |

  13. At 298 K, the conductivity of a saturated solutioni of Agcl in water i...

    Text Solution

    |

  14. One faraday current is passed through molten Na(2)O,MgO and Al(2)O(3)....

    Text Solution

    |

  15. Consider the electrochemical cell between Ag(s) and Cl(2)(g) electrode...

    Text Solution

    |

  16. How many cc of oxygen is released by a current of 2A flowing for 3 min...

    Text Solution

    |

  17. A 250 mL sample of 0.20MCr^(3+) is electrolysed with a current of 96.5...

    Text Solution

    |

  18. 0.02F current is drawn from a lead storage battery. Change in the mass...

    Text Solution

    |

  19. A fuel cell involves combustion of methane at 1atm and 298 K CH(4(g)...

    Text Solution

    |

  20. Select the correct statements 1. Cathode reaction in Ni-Cd cell is ...

    Text Solution

    |