Home
Class 12
CHEMISTRY
Calculate the heat of formation of aceti...

Calculate the heat of formation of acetic acid form the following date:
a. `CH_(3)COOH(l) +2O_(2)(g) rarr 2CO_(2)(g) +2H_(2)O(l)DeltaH^(Theta) =- 200.0kcal`
b. `C(s) +O_(2) (g) rarr CO_(2)(g), DeltaH^(Theta) =- 94.0 kcal`
c. `H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH^(Theta) =- 68.0 kcal`

Text Solution

Verified by Experts

The required equation is
`2C(s)+2H_(2)(g)+O_(2)(g)=CH_(3)COOH(l)," "DeltaH=`?
this equation can be obtained by multiplying eq. (ii) by 2 and also eq. (iii) by 2 and adding both and finally subtracting eq (i)
`[2C+2O_(2)+2H_(2)+O_(2)-CH_(3)COOH(l)-2O_(2)to2CO_(2)+2H_(2)O-2CO_(2)-2H_(2)O]`
`DeltaH_(CH_(3)COOH(l))=2xx(-94.96)+2xx(-68.4)-(-207.9)`
`=-188.96-138.8+207.9`
`=-325.76+207.9=-117.86kcal`
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Illustrations of Objective Questions|58 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Miscellaneous Numerical Examples|22 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Self Assessment (Integer type).|3 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

Calculate the heat of formation of n butane from the followinf data: a. 2C_(4)H_(10)(g) +13O_(2)(g) rarr 8CO_(2)(g) +10H_(2)O(l), DeltaH = - 5757.2 kJ b. C(s) +O_(2) (g)rarrCO_(2)(g), DeltaH =- 405.4 kJ c. 2H_(2)(g) +O_(2)(g) rarr 2H_(2)O(l), DeltaH =- 572.4 kJ

Methanol can be prepared synthetically by heating carbon monoxide and hydrogen gases under pressure in the presenc eof a catalyst. The reaction is CO(g) +2H_(2)(g) rarr CH_(3)OH(l) Determine the enthalpy of this reaction by an appropriate combinantion of the following date: a. C_(("graphite")) +(1)/(2)O_(2)(g) rarr CO(g), DeltaH^(Theta)=- 110.5kJ mol^(-1) b. C_(("graphite")) +O_(2)(g) rarr CO_(2)(g), DeltaH^(Theta) =- 393.5 kJ mol^(-1) c. H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(l), DeltaH^(Theta) =- 285.9kJ mol^(-1) d. CH_(3)OH(l) +(3)/(2)O_(2)(g)rarr CO_(2)(g) +2H_(2)O(l),DeltaH^(Theta) =- 726.6 kJ mol^(-1)

Determine the heat of transformaiton of C_(("dimamond"))rarrC_(("graphite")) form the following data: i. C_(("diamond"))+O_(2)(g) rarr CO_(2)(g), DeltaH^(Theta) =- 94.5 kcal ii. C_(("graphite")) +O_(2)(g) rarr CO_(2)(g),DeltaH^(Theta) =- 94.0 kcal

Calculate the heat of combustion of benzene form the following data: a. 6C(s) +3H_(2)(g) rarr C_(6)H_(6)(l), DeltaH = 49.0 kJ b. H_(2)(g) +1//2O_(2)(g) rarr H_(2)O(l), DeltaH =- 285.8 kJ c. C(s) +O_(2) (g) rarr CO_(2)(g), DeltaH =- 389.3 kJ

Calculate the enthalpy of formation of acetic acid from the following data. CH_3COOH(I) +202 (g) — 2C02 (g) +2H20(I), " " Delta H= -207.9 kcal C(s) +O_2 (g) —C0_2 (g) . ..(ii) Delta H= -94.48 kcal H_(2)(g)+(1)/(2)O_(2)(g)to H_(2)O(l), " " Delta H =-68.4 k cal

Calculate the enthalpy of formation of Delta_(f)H for C_(2)H_(5)OH from tabulated data and its heat of combustion as represented by the following equaitons: i. H_(2)(g) +(1)/(2)O_(2)(g) rarr H_(2)O(g), DeltaH^(Theta) =- 241.8 kJ mol^(-1) ii. C(s) +O_(2)(g) rarr CO_(2)(g),DeltaH^(Theta) =- 393.5kJ mol^(-1) iii. C_(2)H_(5)OH (l) +3O_(2)(g) rarr 3H_(2)O(g) + 2CO_(2)(g), DeltaH^(Theta) =- 1234.7kJ mol^(-1) a. -2747.1 kJ mol^(-1) b. -277.7 kJ mol^(-1) c. 277.7 kJ mol^(-1) d. 2747.1 kJ mol^(-1)

Calculate the standard enthalpy of formation of CH_(3)OH(l) from the following data: CH_(3)OH(l)+3/2O_(2)(g) rarr CO_(2)(g)+2H_(2)O(l), …(i), Delta_(r)H_(1)^(Θ)=-726 kJ mol^(-1) C(g)+O_(2)(g) rarr CO_(2)(g), …(ii), Delta_(c )H_(2)^(Θ)=-393 kJ mol^(-1) H_(2)(g)+1/2O_(2)(g) rarr H_(2)O(l), ...(iii), Delta_(f)H_(3)^(Θ)=-286 kJ mol^(-1)

OP TANDON-Chemical Thermodynamics and Thermochemistry-Solved Example
  1. The enthalpies of neutralisation of a string acid HA and a weaker acid...

    Text Solution

    |

  2. Calculate the standard heat of formation of carbon disulphide (l). Giv...

    Text Solution

    |

  3. Calculate the heat of formation of acetic acid form the following date...

    Text Solution

    |

  4. Given the following standard heats of reactions: (a) heat of formati...

    Text Solution

    |

  5. For the following reaction, C("diamond")+O(2)toCO(2)(g), DeltaH=-94....

    Text Solution

    |

  6. Methanol can be prepared synthetically by heating carbon monoxide and ...

    Text Solution

    |

  7. How much heat will be required to make 2kg of calcium carbide (CaC(2))...

    Text Solution

    |

  8. Calculate DeltaH of the reaction, H-underset(CI)underset(|)overset(H)o...

    Text Solution

    |

  9. Calculate the enthalpy of the following reaction: H(2)C =CH(2)(g) +H...

    Text Solution

    |

  10. The bond dissociation energy of gaseous H(2),Cl(2) and HCl are 104,58 ...

    Text Solution

    |

  11. Calculate the enthalpy of formation of ammonia from the following bond...

    Text Solution

    |

  12. Calculate the resonance enegry of N(2)O form the following data Delt...

    Text Solution

    |

  13. The enthalpies for the following reactions (DeltaH^(Theta)) at 25^(@)C...

    Text Solution

    |

  14. The standard molar enthalpies of formation of cyclohexane (l) and benz...

    Text Solution

    |

  15. Calculate heat of combusion of ethene:

    Text Solution

    |

  16. Using the data (all values are in kilocalorie per mole at 25^(@)C) giv...

    Text Solution

    |

  17. Using the bond enthalpy data given below, calculate the enthalpy of fo...

    Text Solution

    |

  18. The enthalpy change for transition of liquid water to steam is 40.8 kJ...

    Text Solution

    |

  19. What is entropy change for the conversion of one gram of ice to water ...

    Text Solution

    |

  20. Calculate the enthalpy of vaporisation per mole for ethanol. Given Del...

    Text Solution

    |