Home
Class 12
CHEMISTRY
The enthalpies of formation of Al(2)O(3)...

The enthalpies of formation of `Al_(2)O_(3)` and `Cr_(2)O_(3)` are `-1596KJ` and `-1134KJ` respectively. `DeltaH` for the reaction
`2Al+Cr_(2)O_(2)rarr2Cr+Al_(2)O_(3)` is

Text Solution

Verified by Experts

`-462kJ`
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Objective Question Level-A|177 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Set 2|18 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Miscellaneous Numerical Examples|22 Videos

  • CHEMICAL KINETICS

    OP TANDON|Exercise LINKED COMPRESHENSION TYPE QUESTIONS ( SECTION-VI)|4 Videos

  • CLASSIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    OP TANDON|Exercise INTEGER|2 Videos

Similar Questions

Explore conceptually related problems

What is the nature of Al_(2)O_(3) and B_(2)O_(3) ?

The standard enthalpies of formation of Al_(2) O_(3) and CaO are - 1675 kJ m o l^(-1) and - 635 kJ m o l^(-1) respectively For the reaction 3CaO + 2Al rarr 3Ca + Al_(2) O_(3) the standard reaction enthalpy Delta_(r) H^(0) = "__________________"kJ . ( Round off to the Nearest Integer ).

What is the enthalpy change for the given reaction, if enthalpies of formation of Al_(2)O_(3) and Fe_(2)O_(3) are -"1670 kJ mol"^(-1) and -"834 kJ mol"^(-1) respectively? Fe_(2)O_(3) +2Al rarr Al_(2)O_(3)+2Fe

Al_(2)O_(3) reacts with

Delta H_(f)^(@) for Al_(2)O_(3) is -1670 KJ. Calculate the enthalpy change for the reaction 4Al+3O_(2)rarr 2Al_(2)O_(3)

DeltaH_(f)^(@) for Al_(2)O_(3) is -1670kJ . Calculate the enthalpy change for the reaction :4Al+3O_(2) rarr 2Al_(2)O_(3) .

Standard free energy of formation for Al_(2)O_(3) and Cr_(2)O_(3) at 1273 K are -827 kJ mol^(-1) (of O_(2)) and -540 kJ mol^(-1) (of O_(2)) , respectively. Al can reduce Cr_(2)O_(3) to Cr since, Delta_(r) G^(Ө) is negative.

OP TANDON-Chemical Thermodynamics and Thermochemistry-Practice problems
  1. Calculate the heat of hydrogenation of C(2)H(2) to C(2)H(4). H(2)(g)...

    Text Solution

    |

  2. Calculate the heat of hydrogenation , C(2)H(4)(g)+H(2)(g)toC(2)H(6)(...

    Text Solution

    |

  3. The enthalpies of formation of Al(2)O(3) and Cr(2)O(3) are -1596KJ and...

    Text Solution

    |

  4. Calculate DeltaH for the reaction H(2)(g)+1//2O(2)(g)toH(2)O(g) gi...

    Text Solution

    |

  5. Using the bond enthalpy data, calculate DeltaH of the following reacti...

    Text Solution

    |

  6. Calculate the enthalpy of the reaction SnO(2)(s)+2H(2)(g)toSn(s)+2H(...

    Text Solution

    |

  7. Calculate the enthalpies change for the reaction, H(2)(g)+Cl(2)(g)to...

    Text Solution

    |

  8. use the bond energy data and calculate the enthalpy change for 2C(g)...

    Text Solution

    |

  9. Calculate the heat of formation of ammonia from the following data: ...

    Text Solution

    |

  10. Calculate DeltaH(f)^(@) for chloride ion from the following data : (...

    Text Solution

    |

  11. The heat of ionisation of formic acid is 1.5 kJ/ mol. 9.2 g formic aci...

    Text Solution

    |

  12. Assuming that 50% of the heat is useful, how many kg of water at 15^(@...

    Text Solution

    |

  13. The standard potential for the reaction, Ag^(+)(aq.)+Fe^(2+)(aq.)toF...

    Text Solution

    |

  14. Calculate the theoretical maximum efficiency of a heat engine operatin...

    Text Solution

    |

  15. The standard free energies of formation in the gaseous state of methan...

    Text Solution

    |

  16. Ethanol boils at 78.4^@C and the enthalpy of vaporisation of ethanol i...

    Text Solution

    |

  17. The following data is known about the melting of KCl: DeltaH=7.25kJ"...

    Text Solution

    |

  18. DeltaH and DeltaS for the reaction: Ag(2)O(s) rarr 2Ag(s) +(1//2)O(2...

    Text Solution

    |

  19. Calculate the boiling point of the liquid if its entropy of vaporizati...

    Text Solution

    |

  20. Using S^(@) values, calculate the entropy of the reaction, SO(2)(g)+...

    Text Solution

    |