Home
Class 11
CHEMISTRY
Based on the following thermochemical eq...

Based on the following thermochemical equations
`H_(2)O(g)+C(s)rarrCO(g)+H_(2)(g),DeltaH=131KJ`
`CO(g)+1//2O_(2)(g)rarrCO_(2)(g),DeltaH=-282KJ`
`H_(2)(g)+1//2_(2)(g)rarrH_(2)O(g),DeltaH=-242KJ`
`C(s)+O_(2)(g)rarrCO_(2)(g),DeltaH=XKJ`
The value of `X` will be

A

`-393KJ`

B

`-655KJ`

C

`+393KJ`

D

`+655KJH`

Text Solution

Verified by Experts

The correct Answer is:
B
The reaction `C(s)+O_(2)(g)rarrCO_(2)(g)`
is the result of the addition of the given three reaction
`:.DeltaH=X=131+(-282)+(-242)`
`=-393KJ`
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise Entropy, Gibb'S Energy And Spontaneity Of Process|52 Videos

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise Heat Capacity And Calorimetry|13 Videos

  • CHEMICAL THERMODYNAMICS

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • CHEMICAL EQUILIBRIUM

    A2Z|Exercise Section D - Chapter End Test|30 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY OF PROPERTIES

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

If C(s)+O_(2)(g)rarrCO_(2)(g),DeltaH=X and CO(g)+1//2O_(2)(g)rarrCO_(2)(g),DeltaH=Y , then the heat of formation of CO is

Calculate in kJ for the following reaction : C(g) + O_(2)(g) rarr CO_(2)(g) Given that, H_(2)O(g) + C(g) + H_(2)(g) , Delta H = +131 kJ CO(g) + 1/2 O_(2)(g) rarr CO_(2)(g), " " Delta H = -242 kJ H_(2)(g) + 1/2 O_(2)(g) rarr H_(2)O(g), " "DeltaH = -242 kJ

A2Z-CHEMICAL THERMODYNAMICS-Work, Internal Energy And Enthalpy
  1. If H^(+)+OH^(-)rarrH(2)O+13.7Kcal , the heat of neutralisation for com...

    Text Solution

    |

  2. The heat of neutralisation of a strong acid and a strong alkali is 57....

    Text Solution

    |

  3. Based on the following thermochemical equations H(2)O(g)+C(s)rarrCO(...

    Text Solution

    |

  4. If x(1) , x(2) and x(3) are enthalpies of H-H , O=O and O-H bonds resp...

    Text Solution

    |

  5. The standard enthalpy of formation (Delta(f)H^(@)) at 298K for methan...

    Text Solution

    |

  6. Heat of hydrogenation of ethene is x(1) and that of benzene is x(2) . ...

    Text Solution

    |

  7. Under the same conditions, how many mL of 1M KOH and 0.5M H(2)SO(4)sol...

    Text Solution

    |

  8. Bond energy of (N-H) bond is yKJ mol^(-1) under standard state. Thus,c...

    Text Solution

    |

  9. The enthaplpy changes state for the following processes are listed bel...

    Text Solution

    |

  10. For the equations C1 ("diamond") +2H(2)(g)rarrCH(4)(g),DeltaH(1) C...

    Text Solution

    |

  11. If H(2)(g)=2H(g),DeltaH=104cal , then heat of atomisation of hydrogen ...

    Text Solution

    |

  12. The average Xe-F bond energy is 34Kcal//mol , first I.E. Of Xe is 279K...

    Text Solution

    |

  13. The standard enthalpy of formation of NH(3) is -46.0KJ mol^(-1) . If t...

    Text Solution

    |

  14. Given H(2)(g)=2H(g)Delta(H-H)=103Kcal mol^(-1) The heat of reaction ...

    Text Solution

    |

  15. Energy required to dissociate 4g of gaseous hydrogen into free gaseous...

    Text Solution

    |

  16. The H-H bond energy is 430KJ mol^(-1) and Cl-Cl bonds is 240KJ mol^(-1...

    Text Solution

    |

  17. Given the bond energies N=N , H and H-H bond are 945, 436 and 391KJmol...

    Text Solution

    |

  18. AB , A(2) and B(2) are diatomic molecules, if the bond enthalpies of A...

    Text Solution

    |

  19. The standard enthalpies of formation of SF(6)(g) , S(g) and F(g) are -...

    Text Solution

    |

  20. Using bond enthalpies (symbolized by epsilon) an estimated value of De...

    Text Solution

    |