Home
Class 12
CHEMISTRY
The enthalpy combustion of a substance...

The enthalpy combustion of a substance

A

is always positive

B

is always negative

C

can be either zero or greater than zero

D

is unpredictable till calculations are done.

Text Solution

Verified by Experts

The correct Answer is:
B

Combustion reaction is akways exothermic.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    DINESH PUBLICATION|Exercise Additional Numerical Problems For Practice|16 Videos
  • CHEMISTRY IN EVERY DAY LIFE

    DINESH PUBLICATION|Exercise Unit test-9|50 Videos

Similar Questions

Explore conceptually related problems

Enthalpy Of Combustion

What is enthalpy of combustion? Write chemical equation for the enthalpy of combustion of ethanol (C_(2)H_(5)OH) .

The enthalpy of combustion of dimond and enthalpy of formation of carbon dioxide has the same value.

Enthalpy of sublimation of a substance is equal to :

DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. i. H(2)(g) +CI(2)(g)rarr 2HCI(g),DeltaH =- x kJ ii. NaCI +H(2)SO(4) ...

    Text Solution

    |

  2. The reaction SO(2)(g) +1//2O(2)(g) rarr SO(3)(g) should be

    Text Solution

    |

  3. The enthalpy combustion of a substance

    Text Solution

    |

  4. Xg of ethanal was subjected to combustion in a bomb calorimeter and th...

    Text Solution

    |

  5. The enthalpy change for the process C("(graphite)") rarr C((g)), Delta...

    Text Solution

    |

  6. HA+OH^(-) to H(2)O+A^(-)+q(1) kJ H^(+)+OH^(-) to H(2)O+ q(2) kJ Th...

    Text Solution

    |

  7. The heat change accompanying the reaction 2H(2)(g)+O(2)(g) to 2H(2)O...

    Text Solution

    |

  8. When a solid melts there is

    Text Solution

    |

  9. One gram-atom of graphite and one gram-atom of diamond were separately...

    Text Solution

    |

  10. The reaction which shows heat of formation of water correctly is

    Text Solution

    |

  11. Heat of formation, Delta H(f)^(@) of an explosive compound like NCl(3)...

    Text Solution

    |

  12. The products of combustion of an aliphatic thiol (RSH) at 298 K are

    Text Solution

    |

  13. For the transition C("(diamond)") rarr C("(graphite)"), DeltaH=-1.5 kJ...

    Text Solution

    |

  14. Which of the following statements is correct?

    Text Solution

    |

  15. The heat liberated in the following reaction H^(+)(aq)+OH^(-)(aq) to...

    Text Solution

    |

  16. For the neutralisation of 1 mol of H(2)SO(4) with 2 mols of NaOH in d...

    Text Solution

    |

  17. Enthalpy of neutralisation of all strong acids strong bases has the sa...

    Text Solution

    |

  18. A solution of 200 mL of 1 M KOH is added to 200 mL of 1 M HCl and the ...

    Text Solution

    |

  19. The heats of neutralisation of four acids a, b, c and d when neutralis...

    Text Solution

    |

  20. Enthalpy of neutralisation of NaOH with H(2)SO(4) is -57.3kJ mol^(-1) ...

    Text Solution

    |