Home
Class 11
CHEMISTRY
Fe (2 ) O (3 (s)) + (3)/(2) C to (3)/(2)...

`Fe _(2 ) O _(3 (s)) + (3)/(2) C to (3)/(2) CO _(2 (g)) + 2 Fe _((s)) , Delta H ^(@) =+ 234.1kJ`
`C _((s)) + O _(2(g)) to CO _(2 (g)) , Delta H ^(@)=- 393.5 kJ`
Use these equations and AH° values to calculate `DeltaH^(@)` for this reaction: `4Fe (s) + 3 O _(2) (g) to 2Fe _(2) O _(3) (s)`

A

`-1648.7 kJ`

B

`-1255.3 kJ`

C

`-1021.2 kJ`

D

`-129.4 kJ`

Text Solution

Verified by Experts

`2 F (s) + (3)/(2) CO _(2) (g) to Fe _(2) O _(3) (s) + (3)/(2) C (s) (Delta H ^(@) =-234. 1 kJ ) " "...(i)`
`C (s) + O _(2) (g) to CO _(2) (g) " " (Delta H ^(@) =- 393.5 kJ) " "...(ii)`
Multiplying eq. (i) by 2 and eq. (ii) by 3 and on adding both equations, we get :
`4 Fe (s) + 3 O _(2) (g) to 2 Fe _(2) O _(3) (s) , Delta H ^(@) = ( - 234. 1 xx 2) + (- 3 xx 392.5) =- 1648. 7 kJ`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    BRILLIANT PUBLICATION|Exercise LEVEL-II (Assertion-Reason Type)|18 Videos

  • CHEMICAL THERMODYNAMICS

    BRILLIANT PUBLICATION|Exercise LEVEL-III|52 Videos

  • CHEMICAL THERMODYNAMICS

    BRILLIANT PUBLICATION|Exercise LEVEL-I|92 Videos

  • CHEMICAL BONDING AND MOLECULAR STRUCTURE

    BRILLIANT PUBLICATION|Exercise QUESTION (LEVEL -ll)|42 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    BRILLIANT PUBLICATION|Exercise QUESTIONS (LEVEL-III ( Linked Comprehension Type ))|12 Videos

Similar Questions

Explore conceptually related problems

C (diamond) + O _(2) (g) to CO _(2 (g)) , Delta H =- 398 kJ C _(("graphicle")) +O _(2 (g)) to CO _(2 (g)) , Delta H =- 395 kJ the heat liberated when 1g diamond is converted to 1g graphite is

Justify the following reaction is redox reaction Fe_2O_3 (s) + 3CO (g) to 2Fe (s) + 3CO_2 (g)

Justify the given reaction is redox reaction CuO (s) + H_2 (g) toCu (s) +H_2O (g)

Justify the following reaction is redox reaction 4NH_3(g) + 5O_2 (g) to 4NO (g) + 6H_2O (g)

Consider the reaction 4NO_(2(g)) + O _(2 (g)) to 2 N _(2 ) O _(5(g)) , Delta H =-111 kJ If N _(2 ) O _(5 (s)) is formed in the above reaction Delta H will be (Given Delta H for sublimation of N_(2) O_(5) is 54 kJ)

BRILLIANT PUBLICATION-CHEMICAL THERMODYNAMICS -LEVEL-II
  1. On the basis of following thermochemical data :[Delta (f) G ^(@)H^(+) ...

    Text Solution

    |

  2. The standard enthalpy of formation of NH(3) is -46 kJ mol^(-1). If the...

    Text Solution

    |

  3. Fe (2 ) O (3 (s)) + (3)/(2) C to (3)/(2) CO (2 (g)) + 2 Fe ((s)) , Del...

    Text Solution

    |

  4. Given the following data: Determine at what temperature the follo...

    Text Solution

    |

  5. Calculate the increase in internal energy of 1 kg of water at 100^(@)C...

    Text Solution

    |

  6. Oxidizing power of chlorine in aqueous solution can be determined by t...

    Text Solution

    |

  7. A steam boiler made up of steel weighs 900 kg. The boiler contains 400...

    Text Solution

    |

  8. If for the reaction at 300 K, 2 Mg ((s)) + O (2 (g)) to 2 Mg O ((s)) ,...

    Text Solution

    |

  9. The lattice energy of NaCl is +788 kJ mol^(-1). The enthalpies of hydr...

    Text Solution

    |

  10. Using the data given below, pick the correct statement about the react...

    Text Solution

    |

  11. which of the following statements is correct?

    Text Solution

    |

  12. H (2 (g)) + (1)/(2) O (2) to H (2) O ((l)) , Delta H (298 K) = - 68.32...

    Text Solution

    |

  13. Given that,NH (3 (g)) + 3 Cl (2 (g)) hArr NCl (3 (g)) + 3 HCl ((g)) , ...

    Text Solution

    |

  14. One mole of an ideal gas at 300 K is heated at constant volume (V(1) )...

    Text Solution

    |

  15. 1 mol of an ideal gas undergoes reversible isothermal expansion from a...

    Text Solution

    |

  16. The heat evolved on combustion of 1g starch (C (6) H (10) O (5)) (n) i...

    Text Solution

    |

  17. Given the following thermo chemical equations: 2NO ((g)) + O (2 (g))...

    Text Solution

    |

  18. Diborane is a potential rocket fuel which undergoes combustion accordi...

    Text Solution

    |

  19. Calculate the equilibrium constant for a reaction at 400 K given that ...

    Text Solution

    |

  20. The net work done through a series of changes reported in figure for a...

    Text Solution

    |