Home
Class 11
CHEMISTRY
DeltaU^(@) of combustoin of methane is -...

`DeltaU^(@)` of combustoin of methane is `-XKJ mol ^(-1)` The value of `DeltaH^(@)` is :-

A

`= Delta U^( Theta )`

B

`gt Delta U^( Theta )`

C

`lt Delta U^( Theta )`

D

`=0`

Text Solution

Verified by Experts

The correct Answer is:
C
`CH_(4(g)) + 2O_(2(g)) to CO_(2(g)) + 2H_(2)O_((l))`
`therefore Deltan_((g)) = -2`
`therefore Delta H^( Theta ) lt DeltaU^( Theta )`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    KUMAR PRAKASHAN|Exercise Section - C Multiple Choice Questions (MCQs) (MCQs asked in Competitive Exam)|45 Videos

  • THERMODYNAMICS

    KUMAR PRAKASHAN|Exercise Section - C Multiple Choice Questions (MCQs) (MCQs asked in JEE/ NEET / AIEE)|19 Videos

  • THERMODYNAMICS

    KUMAR PRAKASHAN|Exercise Section - C Multiple Choice Questions (MCQs) (Darpan.s Exam Oriented MCQs)|10 Videos

  • THE s-BLOCK ELEMENTS

    KUMAR PRAKASHAN|Exercise Section-D NCERT Exemplar Solution (Long Answer Type)|8 Videos

Similar Questions

Explore conceptually related problems

Standard enthalpy change for combustion of methane is –890 kJ "mol"^(-1) and standard entropy change for the same combustive reaction is -242.98 J.K^(-1) at 25^@C . Calculate DeltaG^@ of the reaction.

Calculate the lattice enthalpy of CaCl_(2) given that the enthalpy of : i) Sublimation of Ca in "121.8 kJ mol"^(-1) ii) Dissociation of Cl_(2) to 2Cl is "242.8 kJ mol"^(-1) iii) Ionisation of Ca" to "Ca^(2+)" is 2422 kJ mol"^(-1) iv) Electron gain for Cl" to "Cl^(-)" is - 355 kJ mol"^(-1) v) DeltaH_(f)^((o))" overall is "-"795 kJ mol"^(-1)

Calculate the enthalpy of combustion of acetic (1) when burnt in excess of O_(2) in a bomb calorimeter. Given that DeltaH_(f)^(@), H_(2)O_((l))=-285.84" KJ mol"^(-1) and Delta_(f)H^(@), CO_(2(g))=-"393.52 KJ mol"^(-1), Delta_(f)H^(@)CH_(3)COOH_((l))=-"463 Kj mol"^(-1) .

KUMAR PRAKASHAN-THERMODYNAMICS-Section - C Multiple Choice Questions (MCQs) (MCQs from Textual Exercise)
  1. For the process to occur under adiabatic conditions, the correct condi...

    Text Solution

    |

  2. The enthalpies of all elements in their standard states are :

    Text Solution

    |

  3. DeltaU^(@) of combustoin of methane is -XKJ mol ^(-1) The value of Del...

    Text Solution

    |

  4. The enthalpy of combustion of methane, graphite and dihydrogen at 298 ...

    Text Solution

    |

  5. A reaction, A+B to C+D+q is found to have a positive entropy change. T...

    Text Solution

    |

  6. Water is bounded in liquid state because of .. ......... bond of water...

    Text Solution

    |

  7. Enthalpy for the reaction C+ O(2) to CO(2) is….

    Text Solution

    |

  8. Which equation from the following is right ?

    Text Solution

    |

  9. Change in heat at constant volume (q(v))=…......

    Text Solution

    |

  10. For isothermal process .......... .

    Text Solution

    |

  11. For the reaction 2Cl((g)) to Cl(2 (g)), the signs of DeltaH and Delta ...

    Text Solution

    |

  12. If the enthalpy of water is 386 kJ, entropy of water is .......... .

    Text Solution

    |

  13. Which of the following reaction has maximum Delta S value?

    Text Solution

    |

  14. Enthalpy of vaporization of water is 186.5 kJ/mol. What will be the en...

    Text Solution

    |

  15. What is the correct from the following for the reaction H(2) O((l)) hA...

    Text Solution

    |

  16. Given C(s)+O(2(g))toCO(2(g)),DeltaH=-94.2K cal H(2(g))+½O(2(g))toH(2...

    Text Solution

    |

  17. Which of the following reaction is endothermic reaction ?

    Text Solution

    |

  18. Enthalpy of formation of SO(2) is 298 kJ calculate combustion enthalpy...

    Text Solution

    |

  19. H^(+) + OH^(-1) to H(2) O + 13.7 K Cal calculate the enthalpy of neutr...

    Text Solution

    |

  20. Fermentation reaction is .......... .

    Text Solution

    |