Home
Class 11
CHEMISTRY
Define the term standard enthalpy of for...

Define the term standard enthalpy of formation `(Delta_(int)H^("ϴ"))`. Also give an exaple.

Text Solution

Verified by Experts

The standard enthalpy of reaction may be defined as the enthalpt change for a reaction when all the reacting species are in their stadrard states .For example, state of solid iron at 500 K is pure iron at 1 bar.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    OMEGA PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS (MCQ)|25 Videos

  • THE S-BLOCK ELEMENTS

    OMEGA PUBLICATION|Exercise MULTIPLE CHOICE QUESTIONS MCQ.s|26 Videos

Similar Questions

Explore conceptually related problems

Define the term standard enthalpy of vaporization (Delta_(vap)H^("ϴ")) .

Define the term standard enthalpy of sublimation (Delta_(vap)H^("ϴ")) .

Define the term bond enthlphy. Give its unit.

Define standard enthalpy of fusion or molar enthaply of fusion (Delta_(fus) H^("ϴ")) .

Define lattice enthalpy of an ionic solid. Also give an example.

Define the term enthalpy of combustion. What is its signification ?

Use the given standard enthalpies of formation (in kJ/mol) to determine the enthalpy of reaction of the following reaction : NH_(3)(g)+3F_(2)(g)rarrNF_(3)+3HF(g) Delta H_(f)^(@)(NH_(3)) (g)=-46.2 , Delta H_(f)^(@)(NF_(3))(g)=-113.0 DeltaH_(f)^(@)(HF) (g)=-269.0

The standard enthalpy of formation of octane (C_(8)H_(18)) is -250kJ //mol . Calculate the enthalpy of combustion of C_(8)H_(18) . The enthalpy of formation of CO_(2)(g) and H_(2)O(l) are -394 kJ//mol and -286kJ//mol respectively.

Mention the enthalpy of mixing (Delta_(mix)H) value to form an ideal solution?

OMEGA PUBLICATION-THERMODYNAMICS-MULTIPLE CHOICE QUESTIONS (MCQ)
  1. Define the term standard enthalpy of formation (Delta(int)H^("ϴ")). Al...

    Text Solution

    |

  2. The intensive property among these quantities is

    Text Solution

    |

  3. Identify the extensive property among the followings

    Text Solution

    |

  4. An adiabatic expansion of an ideal gas always has

    Text Solution

    |

  5. During isothermal expansion of an ideal gas, its

    Text Solution

    |

  6. Enthalpy of a reaction Delta H is expressed as

    Text Solution

    |

  7. The heat required to raise the temperature of a body by 1C degree is c...

    Text Solution

    |

  8. According to the second law of thermodynamics , a process (reaction is...

    Text Solution

    |

  9. Considering entropy (S) as a thermodynamic parameter the criterion fo...

    Text Solution

    |

  10. Delta G = Delta H - T Delta S was given by

    Text Solution

    |

  11. What is pistil?

    Text Solution

    |

  12. The occurrence of reaction is impossible if

    Text Solution

    |

  13. One calorie is equivalent to

    Text Solution

    |

  14. For an adiabatic proces which of the following relations is correct ?

    Text Solution

    |

  15. For the reactions : C(s) + O(2) (g) to CO(2) (g)

    Text Solution

    |

  16. For the reaction : C(3)H(8)(g) + 5O(2) (g) to 3 CO(2) (g) + 4H(2) O...

    Text Solution

    |

  17. Which one of the following expressions represents the first law of the...

    Text Solution

    |

  18. For a reaction N(2(g)) + 3H(2(g)) hArr 2NH(3(g))

    Text Solution

    |

  19. What do mean by the term- Weed?

    Text Solution

    |

  20. What are trees? Give two examples?

    Text Solution

    |

  21. For a reversible process at equilibrium, the change in entropy may be ...

    Text Solution

    |