Home
Class 12
CHEMISTRY
For a phase change H(2)O(l) to H(2)O (g)...

For a phase change `H_(2)O(l) to H_(2)O` (g)

A

`Delta G = 0`

B

`Delta S = 0`

C

`Delta H = 0`

D

`Delta U = 0`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -1B|22 Videos

  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -2|100 Videos

  • THERMODYNAMICS

    ALLEN|Exercise Questions|46 Videos

  • TEST PAPERS

    ALLEN|Exercise MATHEMATICS|2 Videos

  • Thermodynamics And Thermo Chemistry

    ALLEN|Exercise All Questions|40 Videos

Similar Questions

Explore conceptually related problems

For a phase change: H_(2)O(l)hArrH_(2)O(s) 0^(@)C , 1 bar

For the process, H_(2)O(l) to H_(2)O(g)

Calculate the enthalpy of vaporisation for water form the following: H_(2)(g) +1//2O_(2)(g) rarr H_(2)O(g),DeltaH =- 57.0 kcal H_(2)(g) +1//2O_(2)(g) rarr H_(2)O(l),DeltaH =- 68.3 kcal Also calculate the heat required to change 1g H_(2)O(l) to H_(2)O(g)

Assertion : For the change, H_(2)O_((l))rarr H_(2)O_((s)),DeltaH=DeltaU . Reason : No enthalpy change is involved in this process.

Assertion :- At constant pressure for the change H_(2)O(s)rarr H_(2)O(g) work done is negative. Reason :- During phase transition work done is always negative.

Which of the following is true fo the reacion H_(2)O(l)hArr H_(2)O(g) at 100^(@)C and 1 atmosphere

For the reaction C_2H_(5)OH(l) + 3 O_(2)(g) rightarrow 2CO_(2)(g) + 3 H_(2)O(l) , which one is true ?

The standard enthalpies of formation of H_(2)O_(2(l)) and H_(2)O_((l)) are -187.8kJ "mole"^(-1) and -285.8 kJ "mole"^(-1) respectively. The DeltaH^(0) for the decomposition of one mole of H_(2)O_(2(l)) " to" H_(2)O_((l)) and O_(2(g)) is

Calculate the standard enthalpy change (in kJ "mol"^(-1) ) for the reaction H_(2)(g)+O_(2)(g)toH_(2)O_(2)(g) , given that bond enthalpy of H-H, O=O,O-H and O-O (in kJ "mol"^(-1) ) are respectively 438, 498, 464 and 138.

Assertion : In gaseous phase, H_(2)O and H_(2)O_(2) both have bent structures. Reason Bond angle of both H_(2)O and H_(2)O_(2) is 104.5^(@) .

ALLEN-THERMODYNAMICS -EXERCISE -1A
  1. For the reaction of one mole of zinc dust with one mole of sulphuric a...

    Text Solution

    |

  2. When you make ice cubes, the entropy of water

    Text Solution

    |

  3. For a phase change H(2)O(l) to H(2)O (g)

    Text Solution

    |

  4. For a spontaneous process the correct statement is

    Text Solution

    |

  5. The enthalpy change (Delta H) for the reaction, N(2)(g)+3H(2)(g)to 2NH...

    Text Solution

    |

  6. Consider the following reactions: (a) H(aq)^(+) +OH(aq)^(-) to H(2)O...

    Text Solution

    |

  7. Given that bond energies of H–H and Cl–Cl are 430 kJ mol^(-1) and 240...

    Text Solution

    |

  8. Bond dissociation enthalpy of H(2), Cl(2) and HCl are 434, 242 and 431...

    Text Solution

    |

  9. For the gas phase reaction, PCl(5)(g) hArr PCl(3)(g) + Cl(2)(g) Wh...

    Text Solution

    |

  10. Which of the following are not a constant value between two given ther...

    Text Solution

    |

  11. From the following bond energies: H-H bond energy: 431.37KJmol^(-1) ...

    Text Solution

    |

  12. The values of DeltaH and DeltaS for the reaction, C("graphite")+CO(2...

    Text Solution

    |

  13. For vaporization of water at 1 atmospheric pressure the values of Delt...

    Text Solution

    |

  14. Three moles of an ideal gas expanded spontaneously into vaccum. The wo...

    Text Solution

    |

  15. The following two reactions are known : Fe(2)O(3)(s) + 3 CO(g) rightar...

    Text Solution

    |

  16. Standard entropies of X(2), Y(2) and XY(3) are 60, 40 and 50 JK^(–1) m...

    Text Solution

    |

  17. Intensive property is :-

    Text Solution

    |

  18. In which of following there is decrease in entropy :-

    Text Solution

    |

  19. Which of the following is not a state function?

    Text Solution

    |

  20. If the enthalpy change for the transition of liquid water to steam is ...

    Text Solution

    |