Home
Class 12
CHEMISTRY
The heat of formation of Fe(2)O(3) is -8...

The heat of formation of `Fe_(2)O_(3)` is `-824.2` kJ `mol^(-1). Delta H` for the reaction `2Fe_(2)O_(3)(s)rarr 4Fe(s)+3O_(2)(g)` is :

A

`-412.1` kJ

B

`-1648.4` kJ

C

`-3296.8` kJ

D

`1648.4` kJ

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • UNIT TEST 1

    MODERN PUBLICATION|Exercise SELECT THE CORRECT ANSWER|60 Videos
  • UNIT TEST 4

    MODERN PUBLICATION|Exercise QUESTIONS|60 Videos

Similar Questions

Explore conceptually related problems

The enthalpy of the reaction : H_(2)O_(2)(l) rarr H_(2)O(l) + (1)/(2)O_(2)(g) is -98.3 KJ mol^(-1) and the enthalpy of formation of H_(2)O(l) is -285.6 kJ mol^(-1) . The enthalpy of formation of H_(2)O_(2)(l) is :

The enthalpies of formation of N_(2)O and NO at 298 K are 82 and 90 kJ mol^(-1) . The enthalpy of the reaction : N_(2)O(g) + (1)/(2) O_(2) rarr 2 NO(g) is

The value of Delta_(f)G^(@) for formation Cr_(2)O_(3) is -540 kJ mol^(-1) and that of Al_(2)O_(3) is -827 kJ mol^(-1) . Is the reduction of Cr_(2)O_(3) possible with aluminium?

In the reaction Fe_(2)O_(3)+3Cto2Fe+3CO , oxidation number of C

Given that O(g) + e^(-) rarr O^(-)(g) Delta H = - 142 kJ mol^(-1) O(g) + 2e^(-) rarr O^(2-)(g) DeltaH =+712kJmol^(-1) The heat change for the reaction O^(-)(g) + e^(-) rarr O^(2-)(g) is :

Oxidation number of Fe in Fe_(3)O_(4) is :

Predict the sign of Delta S for the following process : H_(2)O_((g)) rarr H_(2)O_((l))

MODERN PUBLICATION-UNIT TEST 2-MCQs
  1. A gas absorbs 120 J of heat and expands against an external pressure o...

    Text Solution

    |

  2. The difference between heats of reaction at constant pressure and cons...

    Text Solution

    |

  3. The heat of formation of Fe(2)O(3) is -824.2 kJ mol^(-1). Delta H for ...

    Text Solution

    |

  4. What will be the pOH of 0.5xx10^(-4)M H(2)SO(4) solution ?

    Text Solution

    |

  5. For a weak base, the concentration of OH^(-) ion at concentration 'c' ...

    Text Solution

    |

  6. Four grams of sodium hydroxide have been added to 10^(3)L tank of wat...

    Text Solution

    |

  7. The ratio of K(p)//K(c ) for the reaction : N(2)(g)+O(2)(g) hArr 2...

    Text Solution

    |

  8. For the reaction : A+B rarr C the initial concentration of A an...

    Text Solution

    |

  9. For the reaction : N(2)+3H(2)hArr 2NH(3), equal number of moles of N(2...

    Text Solution

    |

  10. The equilibrium constant for the reaction 2SO(2)(g)+O(2)(g)hArr 2S...

    Text Solution

    |

  11. The value of K for the reaction : 2A(g)hArr B(g)+C(g)+ Heat at ...

    Text Solution

    |

  12. When CO(2) dissolves in water, the following equilibrium is establishe...

    Text Solution

    |

  13. HI was heated in a sealed tube at 400^(@)C till the equilibrium was re...

    Text Solution

    |

  14. The equilibrium SO(2)Cl(2)(g) hArr SO(2)(g)+Cl(2)(g) is attained at 25...

    Text Solution

    |

  15. The equilibrium constant, K(c ) for the reaction : H(2)+I(2) hArr ...

    Text Solution

    |

  16. Solubility of BaF(2) in a solution of Ba(NO(3))(2) will be represented...

    Text Solution

    |

  17. The following equilibrium are given : N(2)+3H(2)hArr 2NH(3):K(1) ...

    Text Solution

    |

  18. For a sparingly soluble salt A(p)B(q) the relationship between its sol...

    Text Solution

    |

  19. The K(sp) of CuS, Ag(2)S and HgS are 10^(-31), 10^(-44) and 10^(-54) r...

    Text Solution

    |

  20. 500 ml of vessel contains 1.5 M each of A, B, C and D at equilibrium. ...

    Text Solution

    |