Home
Class 12
CHEMISTRY
If, combustion of 4g of CH(4) liberates ...

If, combustion of `4g` of `CH_(4)` liberates `2.5kcal` of heat, the heat of combustion of `CH_(4)` is `:`

A

`-20 " kcal " `

B

`-10.3 " kcal "`

C

`2.5 " kcal " `

D

`-5 " kcal " `

Text Solution

Verified by Experts

The correct Answer is:
B
1 mole `CH_4 -= 16 g " "Delta H =- 2.5 kcal `
`therefore 49 of CH_4`
`therefore Delta H =(-2.5 xx 16)/(4) =- 10 " kcal mol "^(1)`
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics & Energetics

    NIKITA PUBLICATION|Exercise QUESTION FROM COMPETITIVE EXAM|35 Videos

  • CHEMICAL KINETICS

    NIKITA PUBLICATION|Exercise MCQs|351 Videos

  • CHEMISTRY IN EVERYDAY LIFE

    NIKITA PUBLICATION|Exercise MCQs|224 Videos

Similar Questions

Explore conceptually related problems

In the combustion of 0.4 g. of CH_(4) 0.25 Kcal. Of heat is liberated. The heat of combustion of CH_(4) is

In the combustion of 11 g of CO_(2(g)) , 100 kJ of heat is liberated. Heat of combustion of CO_(2(g)) is______ .

In the combusion of 2g benzene, 2.5 kcal heat was evolved. What is the heat of combustion?

NIKITA PUBLICATION-Chemical Thermodynamics & Energetics-QUESTION FROM COMPETITIVE EXAM
  1. If, combustion of 4g of CH(4) liberates 2.5kcal of heat, the heat of c...

    Text Solution

    |

  2. For an endothermic reaction where DeltaH represent the enthalpy of rea...

    Text Solution

    |

  3. Standard entropy of X(2) , Y(2) and XY(3) are 60, 40 and 50JK^(-1)mol...

    Text Solution

    |

  4. Match List I (Equations) with List II (Type of processes) and select t...

    Text Solution

    |

  5. Three moles of an ideal gas expanded spontaneously into vacuum. The wo...

    Text Solution

    |

  6. For vaporization of water at 1 atmospheric pressure the values of Delt...

    Text Solution

    |

  7. The following two reactionas are known FeO(3)(s)+3CO(g)rarr2Fe(s)+CO...

    Text Solution

    |

  8. If the enthaply change for the transition of liquid water to steam is...

    Text Solution

    |

  9. Enthalpy change for the reaction, 4H((g))rarr 2H(2(g)) is -869.6 kJ ...

    Text Solution

    |

  10. Consider the following processes :- {:(,DeltaH(kJ//mol)),((1)/(2)A r...

    Text Solution

    |

  11. In view of the signs of Delta(r)G^(0) for the following reactions Pb...

    Text Solution

    |

  12. The value of enthalpy change (DeltaH) for the reaction C(2)H(5)OH (l...

    Text Solution

    |

  13. Consider the reaction, 4NO(2)(g)+O(2)(g)rarr2N(2)O(5)(g),Delta(r )H=...

    Text Solution

    |

  14. Match the transformation in colums I with appropriate options in colum...

    Text Solution

    |

  15. The entropy change involved in the isothermal reversible expansion of ...

    Text Solution

    |

  16. Which of the following is correct option for the free expansion of an ...

    Text Solution

    |

  17. The Gibbs energy for the decomposition of Al(2)O(3) at 500^(@)C is as...

    Text Solution

    |

  18. The entropy change involved in the isothermal reversible expansion of ...

    Text Solution

    |

  19. The incorrect expression among the following is

    Text Solution

    |

  20. In which of the following reactions,standard reaction entropy change(D...

    Text Solution

    |

  21. The enthalpy of fusion of water is 1.435 kcal//"mole". The molar entro...

    Text Solution

    |