Home
Class 12
CHEMISTRY
The enthalpy change on freezing of 1 mol...

The enthalpy change on freezing of 1 mol of water at `5^(@)`C to ice at `-5^(@)`C is :
(Given `Delta_("fus")H=6 KJ "mol"^(-1) " at " 0^(@)C,`
`C_(p)(H_(2)O,l)=75.3 J "mol"^(-1) K^(-1)`,
`C_(p) (H_(2)O,S)=36.8 J "mol"^(-1) K^(-1))`

A

`-8.153(KJ)/(mol)`

B

`+7.251(KJ)/(mol)`

C

`-7.151(KJ)/(mol)`

D

`-6.115(KJ)/(mol)`

Text Solution

Verified by Experts

The correct Answer is:
C

`N//A`
Promotional Banner

Topper's Solved these Questions

  • TEST PAPER

    ALLEN|Exercise Exercise (Chemistry)|161 Videos
  • TEST PAPER

    ALLEN|Exercise Exercise (Chemstry)|26 Videos
  • SURFACE CHEMISTRY

    ALLEN|Exercise ASSERTION & REASO|20 Videos
  • TEST PAPER 1

    ALLEN|Exercise CHEMISTRY|11 Videos

Similar Questions

Explore conceptually related problems

Calculate the enthalpy change of freezing of 1.0 mol of water at 10^(@)C to ice at -10^(@)C, Delta_(fus)H=6.03 kJ mol^(-1) at 0^(@)C . C_(P)[H_(2)O(l)]=75.3 J mol^(-1) K^(-1) C_(P)[H_(2)O(s)]=36.8 J mol^(-1) K^(-1)

Calcualte the enthalpy change on freezing of 1.0 mole of water at 10.0^(@)C to ice at -10^(@) C. Delta_(fs)H=6.03 kJ mol^(-1) at 0^(@)C . C_(p)[H_(2)O(l)] = 75.3 J mol^(-1) K^(-1), C_(P)[H_(2)O(s)] = 36.8 Jmol^(-1)K^(-1)

Calculate the entropy change for vaporization of 1mol of liquid water to steam at 100^(@)C , if Delta_(V)H = 40.8 kJ mol^(-1) .

Find the entropy change when 90 g of H_(2)O at 10^(@) C was converted into steam at 100^(@) C. [ Given C_(P)(H_(2)O)=75.29 JK^(-1)mol^(-1) and Delta H_("vap")=43.932 JK^(-1)mol^(-1) ]

Predict the standard reaction enthalpy of 2NO_(2)(g)rarrN_(2)O_(4)(g) at 100^(@)C . Delta H^(@) at 25^(@)C is -57.2 kj.mol^(-1)C_(p)(NO_(2))=37.2j.mol^(-1)K^(-1)C_(p)(N_(2)O_(4))=77.28 J. mol^(-1)k^(-1)

The heat of formation of HCl at 348 K from the following data will be : 0.5H_(2)(g)+0.5Cl_(2)(g)toHCl " "DeltaH_(298)^(@)=-22060 cal. The mean heat capacities over this temperature range are, H_(2)(g)," " C_(p)=6.82 " cal" " mol"^(-1)K^(-1) Cl_(2)(g)," " C_(p)=7.71 " cal" " mol"^(-1)K^(-1) HCl(g)," " C_(p)=6.81 " cal" " mol"^(-1)K^(-1)

Calculate the enthalpy change for the process C Cl_(4)(g) rarr C(g)+4Cl(g) and calculate bond enthalpy of C-Cl in C Cl_(4)(g) . Delta_(vap)H^(Θ)(C Cl_(4))=30.5 kJ mol^(-1) Delta_(f)H^(Θ)(C Cl_(4))=-135.5 kJ mol^(-1) Delta_(a)H^(Θ)(C )=715.0 kJ mol^(-1) , where Delta_(a)H^(Θ) is enthalpy of atomisation Delta_(a)H^(Θ)(Cl_(2))=242 kJ mol^(-1)

Calculate the standard free energy change for the reaction: H_(2)(g) +I_(2)(g) rarr 2HI(g), DeltaH^(Theta) = 51.9 kJ mol^(-1) Given: S^(Theta) (H_(2)) = 130.6 J K^(-1) mol^(-1) , S^(Theta) (I_(2)) = 116.7 J K^(-1) mol^(-1) and S^(Theta) (HI) = 206.8 J K^(-1) mol^(-1) .

Calculate the standard free energy change for the reaction: H_(2)(g) +I_(2)(g) rarr 2HI(g), DeltaH^(Theta) = 51.9 kJ mol^(-1) Given: S^(Theta) (H_(2)) = 130.6 J K^(-1) mol^(-1) , S^(Theta) (I_(2)) = 116.7 J K^(-1) mol^(-1) and S^(Theta) (HI) =- 206.8 J K^(-1) mol^(-1) .

The value of log_(10)K for a reaction A hArr B is (Given: Delta_(f)H_(298K)^(Theta) =- 54.07 kJ mol^(-1) , Delta_(r)S_(298K)^(Theta) =10 JK^(=1) mol^(-1) , and R = 8.314 J K^(-1) mol^(-1)

ALLEN-TEST PAPER-Exercise (Chemstry)
  1. The enthalpy change on freezing of 1 mol of water at 5^(@)C to ice at ...

    Text Solution

    |

  2. Assertion (A): The enthalpy of formation of H(2)O(l) is greater than t...

    Text Solution

    |

  3. Assertion :- The molarity of a certain solution is always greater than...

    Text Solution

    |

  4. Assertion :- K(c) for process 2H(2)O(l)hArr2H(2)O((g))+O(2(g))may be w...

    Text Solution

    |

  5. Assertion :- Adding inert gas at equilibrium to dissociation of PCl(...

    Text Solution

    |

  6. Assertion (A) At constant temperature, pV vs V plot for real gases is ...

    Text Solution

    |

  7. Assertion :- Change in internal energy is zero for all gases at consta...

    Text Solution

    |

  8. Assertion :- Following amide exist in two structural forms. Reaso...

    Text Solution

    |

  9. Assertion :- Benzaldehyde forms two oximes on reaction with NH(2)OH. ...

    Text Solution

    |

  10. Assertion : -I effect of Cl atom is greater than F atom. Reason : Cl...

    Text Solution

    |

  11. Assertion: Cyclobutane is less stable than cyclopentane Reason : T...

    Text Solution

    |

  12. Assertion : The IUPAC name for the compound C(6)H(5)COOCH(2)CH(2)COOH ...

    Text Solution

    |

  13. Assertion :- The IUPAC name for the compound is 7-oxabicyclo [4,1,3] ...

    Text Solution

    |

  14. Assertion :- The IUPAC name of the compound is cyclohexylidene methan...

    Text Solution

    |

  15. Assertion (A) Electron gain enthalpy becomes less negative as we go do...

    Text Solution

    |

  16. Why does the reaction. proceed better with KF than with NaF ?

    Text Solution

    |

  17. Assertion :- Fire in reaction between saline hydride and water can ...

    Text Solution

    |

  18. Assertion :- BaSO(4) forms white ppt in water. Reason :- Its lattice...

    Text Solution

    |

  19. Assertion (A) SF(6) cannot be hydrolysed but SF(4) can be. Reason...

    Text Solution

    |

  20. A:Mn(2)O(7), is acidic in nature R: My has +7 oxidation state:

    Text Solution

    |

  21. Assertion (A) : Silicones are water repelling in nature Reason (R) :...

    Text Solution

    |