Home
Class 12
CHEMISTRY
The enthalpy of formation (DeltarH) of m...

The enthalpy of formation `(Delta_rH)` of methanol, formaldehyde and water -239, -116 and -286KJ`mol^-1` respectively. The enthalpy change for the oxidation of emthanol to formaldehyde and water in KJ is

A

-136

B

-173

C

-163

D

163

Text Solution

Verified by Experts

The correct Answer is:
C
Answer(3) Enthalpy change `[DeltaH] = sum Delta_f `H[Products] - `sum Delta_f H`[Reactants]
(-116 -286) - (-239) .
`therefore DeltaH = -163`
Promotional Banner

Topper's Solved these Questions

  • EAMCET -2016 (TS)

    SIA PUBLICATION|Exercise CHEMISTRY|4 Videos

  • EAMCET-2019 (TS) SHIFT-1

    SIA PUBLICATION|Exercise CHEMISTRY|30 Videos

Similar Questions

Explore conceptually related problems

The enthalpies of combustion of carbon and carbon monoxide are -390 KJ mol^(-1) and -278 KJ mol^(-1) respectively. The enthalpy of formation of carbon monoxide is

The enthalpy of formation of N_2O_((g)) and NO_((g)) are 82.0 KJ and 90 KJmol^(-1) respectively. The enthalpy of the reaction 2N_2O_((g)) + O_(2(g)) rarr 4NO_((g)) is

If the standard molar enthalpy of formation of SO _(2 (g)) and SO _(3(g)) is - 296 . 82 kJ mol ^(-1) and -395 . 72 kJ mol ^(-1) respectively, then enthalpy change for the reaction in kJ mol ^(-1) , SO _(2 (g)) + (1)/(2) O _(2 (g)) to SO _(3(g)) , is

The enthalpy of formation of ammonia is -46.0 KJ mol^(-1) . The enthalpy change for the reaction 2NH_3 rarr N_2 + 3H_2 is

The standard enthalpies of formation of CO_(2) gas and HCOOH_((l)) are -393.7 kJ mol^(-1) and -409.2 kJ mol^(-1) respectively. Which of the following are correct?

The standard molar enthalpies of formation of cyclohexane (l) and benzene (l) at 25^(@)C "are" -156 and +49kJ mol^(-1) respectively. The standard enthalpy of hydrogenation of cyclohexene (l) at 25^(@)C is -119kJ mol^(-1) . Use these data to estimate the magnitude of the resonance energy of benzene.

The enthalpy of solution of BaCl_(2)(s) and BaCl_(2).2H_(2)O(s) " are " -20.6 and 8.8 KJ mol^(-1) , respectively, The enthalpy change for the reaction BaCl_(2(s)) + 2H_(2)O rarr BaCl_(2), 2H_(2)O_((s)) is:

The standard enthalpy of formation of hypothetical MgCl is -125kJ mol^(-1) and for MgCl_(2) is -642 kJ mol^(-1) . What is the enthalpy of the disproportionation of MgCl ?

If enthalpy of combustion of carbon to CO_(2) (g) is -394.0kJ mol^(-1) , the enthalpy change for the formation of 17.6 g of CO_(2) from carbon and dioxygen at the same temperature in kJ is

The enthalpy of combustion of cyclohexane cyclohexene and H_2 are respectively -3920, -3800 and -241 KJ mol^(-1) . The heat of hydrogenation of cyclohexene in KJ mol^(-1) is

SIA PUBLICATION-EAMCET QUESTION PAPER 2017-CHEMISTRY
  1. At 27^@C ina 10L flask 4.0g of an ideal gaseous mixture conatining He ...

    Text Solution

    |

  2. Two oxides of a non-metal X contain 50% and 40% of non -metal respecti...

    Text Solution

    |

  3. The enthalpy of formation (DeltarH) of methanol, formaldehyde and wate...

    Text Solution

    |

  4. i) H3PO(4(aq)) iff H^ (aq)+ H2PO(4(aq))^- ii)H2PO(4(aq))^- iff H^ +(...

    Text Solution

    |

  5. The equilibrium constant (Kc) for the following equilibrium 2So(2(g)) ...

    Text Solution

    |

  6. How many mililiters of 20 volume of H2O2 solution is needed to react c...

    Text Solution

    |

  7. Which one of the following statements is not correct?

    Text Solution

    |

  8. In which of the following reactions, Hydrogen is liberated? (a ) Al(s...

    Text Solution

    |

  9. Which one of the following statements is not correct?

    Text Solution

    |

  10. Which of the following forms holes in the Ozone layer?

    Text Solution

    |

  11. Identify the correct statements from the following Electromeric effec...

    Text Solution

    |

  12. The gaseous products formed at cathode (X) and anode (Y), when an aque...

    Text Solution

    |

  13. Identify the correct statements for a ring system to exhibit aromatici...

    Text Solution

    |

  14. An element has a body centered cubic structure with a unit cell edge l...

    Text Solution

    |

  15. 31 g of ethylene glycol (C2H6O2) is dissolved in 600g of water. The fr...

    Text Solution

    |

  16. Which one of the following solutions of compounds show highest osmotic...

    Text Solution

    |

  17. Same amount of electricity is passed through aqueous solutions of AgNO...

    Text Solution

    |

  18. Colloidal solution of gold is in different colours like red, purple, b...

    Text Solution

    |

  19. Copper matte contains

    Text Solution

    |

  20. S + conc. H2SO4 rightarrow X+Y here X is a gas and Y is a liquid and b...

    Text Solution

    |