Home
Class 11
CHEMISTRY
Calculate the enthalpy change for the re...

Calculate the enthalpy change for the reaction `Fe_2O_3 +3CO to 2Fe +3CO_2` from the following data.
`2Fe +3/2 O_2 to Fe_2O_3 , DeltaH`=-741 kJ
`C+1/2O_2 to CO , DeltaH`=-137 kJ
`C+O_2 to CO_2 , DeltaH`=-394.5 kJ

Text Solution

Verified by Experts

Given : `DeltaH_f(Fe_2O_3)=-741 "kJ mol"^(-1)`
`DeltaH_f(CO)=-137 "kJ mol"^(-1)`
`DeltaH_f(CO_2)=-394.5 "kJ mol"^(-1)`
`Fe_2O_3 + 3CO to 2Fe + 3CO_2 " " DeltaHr`=?
`DeltaH_r=sum(DeltaH_f)_"products"-sum (DeltaH_f)_"reactants"`
`DeltaH_r=[2DeltaH_f(Fe)+3DeltaH_f(CO_2)]-[DeltaH_f (Fe_2O_3) + 3DeltaH_f (CO)]`
`DeltaH_r` =[0+3(-394.5)]-[-741+3(-137)]
`DeltaH_r`=-1183.5 +1152
`DeltaH_r=-31.5 "kJ mol"^(-1)`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    FULL MARKS|Exercise In-Text Questions -Evaluate Yourself|8 Videos

  • THERMODYNAMICS

    FULL MARKS|Exercise Additional Questions Solved (I)|39 Videos

  • THERMODYNAMICS

    FULL MARKS|Exercise Textual Question Solved (MCQs)|25 Videos

  • SOLVED PAPER 13 (UNSOLVED)

    FULL MARKS|Exercise PART-II|9 Videos

Similar Questions

Explore conceptually related problems

Balance the following equations Fe + H_2O to Fe_3O_4 + H_2

Fe_2O_3, Fe_3O_4, FeS_2, Cu_2 O

Balance the equations FeS + O_2 to Fe_2O_3 + SO_2 ( molecular form )

Calculate the standard enthalpy of formation of CH_3OH_((l)) from the following data : (i) CH_3OH_((l)) +3//2 O_(2(g)) to CO_(2(g)) + 2H_2O_((l)) , Delta_r H^(Ө)=-726 "kJ mol"^(-1) (ii) C_((s)) + O_(2(g)) to CO_(2(g)) , Delta_c H^(Ө)=-393 "kJ mol"^(-1) (iii) H_(2(g)) +1//2O_(2(g)) to H_2O_((l)) , Delta_f H^(Ө)=-286 "kJ mol"^(-1)

C_2H_5OH +3 O_2 to 2CO_2+3H_2O is a

Calculate the respiratory quotient from the following equation C_4H_6O_5 + 3O_2 to 4CO_2 3H_2O + "Energy"

FULL MARKS-THERMODYNAMICS -Textual Question Solved
  1. Define Gibb's free energy .

    Text Solution

    |

  2. Calculate the work done when 2 moles of an ideal gas expands reversibl...

    Text Solution

    |

  3. In a constant volume calorimeter, 3.5 g of a gas with molecular weight...

    Text Solution

    |

  4. Calculate the entropy change in the system and surroundings, and the t...

    Text Solution

    |

  5. 1 mole of an ideal gas, maintained at 4.1 atm and at a certain tempera...

    Text Solution

    |

  6. 30.4 kJ is required to melt one mole of sodium chloride. The entropy c...

    Text Solution

    |

  7. Calculate the standard heat of formation of propane, if its heat of co...

    Text Solution

    |

  8. You are given normal boiling points and standard enthalpies of vaporiz...

    Text Solution

    |

  9. DeltaH and DeltaS for the reaction Ag(2)O((s))rarr2Ag((s))+1/2O(2((g...

    Text Solution

    |

  10. What is the equilibrium constant K(eq) for the following reaction at 4...

    Text Solution

    |

  11. Cyanamide (NH2CN) is completely burnt in excess oxygen in a bomb calor...

    Text Solution

    |

  12. Calculate the enthalpy of hydrogenation of ethylene from the following...

    Text Solution

    |

  13. Calculate the lattice energy of CaCl2 from the given data. Ca((s)) +...

    Text Solution

    |

  14. Calculate the enthalpy change for the reaction Fe2O3 +3CO to 2Fe +3CO2...

    Text Solution

    |

  15. When 1-pentyne (A) is treated with 4N alcoholic KOH at 175^@C, it is c...

    Text Solution

    |

  16. At 33K , N(2)O(4) is fifty percent dissociated Calculate the standard ...

    Text Solution

    |

  17. The standard enthalpies of formation of SO2 and SO3 are -297 "kJ mol"...

    Text Solution

    |

  18. For the reaction at 298 K : 2A +B to C DeltaH="400 KJ mol"^(-1) , De...

    Text Solution

    |

  19. Find out the value of equilibrium constant for the following reaction ...

    Text Solution

    |

  20. A gas mixture of 3.67 lit of ethylene and methane on complete combusti...

    Text Solution

    |