Home
Class 12
CHEMISTRY
Find out the heat evolved in combustion ...

Find out the heat evolved in combustion if 112 litre (at 1 atm, 273 K) of water gas (mixture of equal volume of `H_(2)(g)` and CO(g)) is combusted with excess oxygen.
`H_(2)(g)+(1)/(2)O_(2)(g)rarrH_(2)O(g), Delta=-241.8 kJ` `CO(g)+(1)/(2)O_(2)(g)rarrCO_(2)(g), Delta=-283 kJ`

A

241.8 kJ

B

283 K J

C

1312 kJ

D

`-1312 kJ`

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaH` for combustion of 56 L `H_(2)=(-241.8xx56)/(22.4) =- 604.5`
`DeltaH` for combustion of 56 L CO `= (-283xx56)/(22.4)=-707.5 "therefore " Total DeltaH = - 604.5-707.5 = - 1312 "kJ"`
Heat evolved = 1312 kJ.
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

Find out the heat evolved in combustion if 112 litres ( at STP ) of water gas (mixture of eqal volume of H_(2)(g) and CO(g))) . {:(H_(2)(g)+1//2O_(2)(g)rarrH_(2)O(g),,,,DeltaH= -241.8 kJ),(CO(g)+1//2O_(2)(g)rarrCO_(2)(g),,,,DeltaH= -283 kJ):}

The enthalpy of vaporisation of liquid water using the data H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(l) , DeltaH=-285.77 kJ//mol H_(2)(g)+(1)/(2)O_(2)(g)toH_(2)O(g) , DeltaH=-241.84 kJ//mol

In the reaction CO_(2)(g)+H_(2)(g)rarrCO(g)+H_(2)O(g), DeltaH=2.8 kJ DeltaH represents

In the reaction , CO_(2)(g)+H_(2)(g)rarrCO(g)+H_(2)O(g), " "DeltaH= 2.8kJ, DeltaH represents

NIKITA PUBLICATION-Chemical Thermodynamics & Energetics-QUESTION FROM COMPETITIVE EXAM
  1. Find out the heat evolved in combustion if 112 litre (at 1 atm, 273 K)...

    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

    |