Home
Class 11
CHEMISTRY
DeltaH^(@) " of " H(2)O((l)) is ………… KJ/...

`DeltaH^(@) " of " H_(2)O_((l))` is ………… KJ/mol.

A

`-74.85`

B

`+281`

C

`+242`

D

`+74.85`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    SURA PUBLICATION|Exercise ADDITIONAL SHORT ANSWERS|46 Videos

  • THERMODYNAMICS

    SURA PUBLICATION|Exercise ADDITIONAL LONG ANSWERS|12 Videos

  • THERMODYNAMICS

    SURA PUBLICATION|Exercise II.WRITE BRIEF ANSWER TO THE FOLLOWING QUESTIONS|52 Videos

  • SURAS. MODEL QUESTION PAPER - 2

    SURA PUBLICATION|Exercise Part - D (Answer all five questions:)|15 Videos

Similar Questions

Explore conceptually related problems

Calculate the enthalpy of combustion of acetic (1) when burnt in excess of O_(2) in a bomb calorimeter. Given that DeltaH_(f)^(@), H_(2)O_((l))=-285.84" KJ mol"^(-1) and Delta_(f)H^(@), CO_(2(g))=-"393.52 KJ mol"^(-1), Delta_(f)H^(@)CH_(3)COOH_((l))=-"463 Kj mol"^(-1) .

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)

Given that C_((g))+O_(2(g)) to CO_(2(g)) DeltaH^@=-a kJ , 2 CO_((g)) + O_(2(g)) to 2CO_(2(g)) 'DeltaH^@ =-b kJ , Calculate the DeltaH^@ for the reaction C_((g)) +1//2O_(2(g)) to CO_((g))

will the reaction, I_(2_((g)))+H_(2)S_((g))rarr2HI_((g))+S_((s)) proceed spontaneously in the forward direction at 298K ? You are given with DeltaG^(@) for HI and H_(2) as 1.8 and -33.8 kJ mol^(-1) respectively . Given : I_(2_((g)))+H_(2)S_((g))rarr2HI_((g))+S_((s)) DeltaG_(HI)^(@)=1.8kJ mol^(-1) DeltaG_(H_(2)S)^(@)=1.8kJ mol^(-1)

Calculate standard free energy of formation of H_2O_((l)) . The standard enthalpy of formation of H_2O_((l)) is 285.85 kJ and standard entropies of H_(2(g)), O_(2(g)) and H_2O_((l)) are130.5, 205.0 and 70.3 J. K^(-1) "mole"^(-1) respectively.

Calculate the lattice enthalpy of CaCl_(2) given that the enthalpy of : i) Sublimation of Ca in "121.8 kJ mol"^(-1) ii) Dissociation of Cl_(2) to 2Cl is "242.8 kJ mol"^(-1) iii) Ionisation of Ca" to "Ca^(2+)" is 2422 kJ mol"^(-1) iv) Electron gain for Cl" to "Cl^(-)" is - 355 kJ mol"^(-1) v) DeltaH_(f)^((o))" overall is "-"795 kJ mol"^(-1)

SURA PUBLICATION-THERMODYNAMICS -ADDITIONAL QUESTIONS
  1. ………….is an intensive property .

    Text Solution

    |

  2. State the first law of thermodynamics .

    Text Solution

    |

  3. DeltaH^(@) " of " H(2)O((l)) is ………… KJ/mol.

    Text Solution

    |

  4. Heat of combustion of methane is ……….. KJ/ mol .

    Text Solution

    |

  5. The SI unit of Molar heat capacity is :

    Text Solution

    |

  6. Molar heat capacity at constant volume is …………….

    Text Solution

    |

  7. The relation between C(P) and C(V) is …………

    Text Solution

    |

  8. The branch of science associated with determining the changes in energ...

    Text Solution

    |

  9. Heat absorbed at constant volume is measured in ……….. Calorimeter.

    Text Solution

    |

  10. For an exothermic reaction DeltaH(r) value will be ……………

    Text Solution

    |

  11. The heat of neutralisation of strong acid and strong base is …………..

    Text Solution

    |

  12. The SI unit of entropy is ………….

    Text Solution

    |

  13. The change in enthalpy when one mole of C("diamond") " to " C ("graph...

    Text Solution

    |

  14. Hess's law can be applied to calculate ……….of reactions.

    Text Solution

    |

  15. Change in enthalpy is

    Text Solution

    |

  16. The change in enthalpy of NaOH+HClrarrNaCl+H(2)O is called ………

    Text Solution

    |

  17. % efficiency can be calculated using the formula

    Text Solution

    |

  18. If an automobile engine burns petrol at a temperature of 816^(@)C and...

    Text Solution

    |

  19. which of the following processes are accompanied by an increase of ent...

    Text Solution

    |

  20. The enthalpies of all elements in their standard states are

    Text Solution

    |