Home
Class 12
CHEMISTRY
The standard heats of formation at 298K ...

The standard heats of formation at 298K for `C Cl_(4)(g),H_(2)O(g),CO_(2)(g) and HCl(g)` are `-25.5,-57.8,-94.1 and -22.1` kcal `mol^(-1)` respectively. Calculate `DeltaH_(298)^(@)` for the reaction.
`C Cl_(4)(g)+2H_(2)O(g)toCO_(2)(g)+4HCl(g)`.

Text Solution

Verified by Experts

`DeltaH_("reaction")=sum` Heat of formation of products-`sum` Heat of formation of reactants.
`=[DeltaH_(f(CO_(2)))+4DeltaH_(f(HCl))]-[DeltaH_(f(C Cl_(4)))+2DeltaH_(f(H_(2)O))]`
`=[-94.1+4xx(-22.1)]-[-25.5+2xx(-57.8)]`
`=-41.8kcal`
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Practice problems|81 Videos

  • Chemical Thermodynamics and Thermochemistry

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

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Illustrations of Objective Questions|58 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

The standard heat of formation of at 298 K for CCl_(4)(g), H_(2)O(g), CO_(2)(g) and HCI(g) are -25.5, -57.8, -94.1 and -22.1 kcal mol^(-1) respectively. Calculate Delta_(r)H^(Theta) for the reaction r CCl_(4)(g)+2H_(2)O(g) rarr CO_(2)(g)+4HCl(g) Hint : Delta_(r)H^(Theta) = sum Delta_(f)H_("Products")^(Theta)- sum Delta_(f)H_("Reactants")^(Theta)

At 298 K, the heats of formation fo C Cl_(4) (g), H_(2)O(g), CO_(2)(g) and HCl(g) are -25, -57, -94 and -22 K.cal mol^(-1) respectively. The DeltaH of the reaction: C Cl_(4)(g) +2H_(2)O rarr CO_(2) (g) +4HCl(g)

The standared enthalpies of formation at 298K for C C1(g), H_(2)O(g), CO_(2)(g) and HC1(g) are -106.7, -241.8, -393.7 , and -92.5kJ mol^(-1) , respectively. Calculate DeltaH^(Theta)underset(298K) for the reaction C C1_(4)(g) +2H_(2)O(g) rarr CO_(2)(g) +4HCI_(g)

DeltaH_(t)^(@) for CO_(2)(g) and H_(2)O(g) are -393.5, -110.5 and -241.8 kJ"mol"^(-1) respectively. The standard enthalpy change (in kJ) for the reaction. CO_(2)(g) + H_(2)(g) to CO(g) + H_(2)O(g) is:

Delta H_(1)^(@) for CO_(2)(g) , CO(g) and H_(2)O(g) are -393.5,-110.5 and -241.8 kJ mol^(-1) respectively. Standard enthalpy change for the reacion CO_(2)(g)+H_(2)(g) rarr CO(g) + H_(2)O(g) is

The DeltaH_(f)^(@) for CO_(2)(g) , CO(g) and H_(2)O(g) are -395.5,-110.5 and -241.8" kJ" mol^(-1) respectively. The standard enthalpy change in (in kJ) for the reaction CO_(2)(g)+H_(2)(g)toCO(g)+H_(2)O(g) is

OP TANDON-Chemical Thermodynamics and Thermochemistry-Miscellaneous Numerical Examples
  1. The standared heat of formation listed for gaseous NH(3) is -11.0kcal ...

    Text Solution

    |

  2. The heat of combusion of glycogen is about 476 kJ mol^(-1) of carbon. ...

    Text Solution

    |

  3. At 25^(@)C, the following heat of formations are given: {:("Compound...

    Text Solution

    |

  4. The 'heat of total cracking' of hydrocarbons DeltaH(TC) is defined as ...

    Text Solution

    |

  5. A constant pressure calorimeter consists of an insulated beaker of mas...

    Text Solution

    |

  6. C(2)H(4) +CI(2) rarr C(2)H(4)CI(2) DeltaH =- 270.6 kJ mol^(-1)K^(-1)...

    Text Solution

    |

  7. Find bond enthalpy of S-S bond from the following data: C(2)H(5)-S-C...

    Text Solution

    |

  8. A natural gas may be assumed to be a mixture of methane and ethane onl...

    Text Solution

    |

  9. From the data at 25^(@)C: Fe(2)O(3)(s) +3C(("graphite")) rarr 2Fe(s)...

    Text Solution

    |

  10. Calculate DeltaH at 85^(@)C for the reaction: Fe(2)O(3)(s) +3H(2)(g)...

    Text Solution

    |

  11. The standard heats of formation at 298K for C Cl(4)(g),H(2)O(g),CO(2)(...

    Text Solution

    |

  12. Calculateq, W, DeltaU and DeltaH for the isothermal reversible expansi...

    Text Solution

    |

  13. A sample of argon gas at 1atm pressure and 27^(@)C expands reversibly ...

    Text Solution

    |

  14. Show that the reaction CO(g) +(1//2)O(2)(g) rarr CO(2)(g) at 300K ...

    Text Solution

    |

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

    Text Solution

    |

  16. An insulated vessel contains 1mole of a liquid, molar volume 100mL at ...

    Text Solution

    |

  17. In the reaction equilibrium N(2)O(4) hArr 2NO(2)(g) When 5 mol of ...

    Text Solution

    |

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

    Text Solution

    |

  19. Two moles of a perfect gas undergo the following processes: a. A rev...

    Text Solution

    |

  20. The surface of copper gets tarnished by the formation of copper oxide....

    Text Solution

    |