Home
Class 12
CHEMISTRY
1.25 of sample of C Cl2F2 was cooled at ...

1.25 of sample of `C Cl_2F_2` was cooled at a constant pressure of 1 atm. From 320 K to 293 K. During cooling, the volume decreased from 274 to 248 mL. `Delta H and DeltaU" for " C Cl_2 F_2 " is " (C_p = 80. 7 J mol^(-1) K^(-1))` :

A

`-22.5 J,- 19.88J`

B

`19.88 J, - 25.51 J`

C

`108.26 J, -4659 J`

D

`- 26.7 J, 89.5 J`.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • ISOMERISM IN ORGANIC COMPOUNDS

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTIONS|1 Videos

  • MOCK TEST PAPER - 3

    MODERN PUBLICATION|Exercise MCQs|60 Videos

Similar Questions

Explore conceptually related problems

A semi-conductor is cooled from T_1K to T_2K . Its resistance

A 10L flask at 300K contains a gaseous mixture of CO and CO_(2) at a total pressure of 2.0 atm. If 0.2 mol of CO is present, the partial pressure of CO_(2) is ( Use R = 0.082 atm mol^(-1) K^(-1) )

The osmotic pressure of a solution at 273 K is 2.5 atm. The osmotic pressure of the same solution at 273^(@)C is :

After adding non-volatile solute freezing point of water decreases to - 0.186^@C . Calculate DeltaT_b if K_f = 1.86 K kg mol^(-1) and K_b = 0.521 K kg mol^(-1)

For the reaction at 800 K N_(2)(g)+3H_(2)(g)hArr 2NH_(3)(g) the ratio of K_(p) and K_(c ) is : (R = 0.082 L atm mol^(-1)K^(-1) )

After adding non-volatile solute freezing point of water decreases to -0.186^(@)C . Calculate Delta T_(b) if K_(f)=1.86 " K kg mol"^(-1) and K_(b)=0.21 "K kg mol"^(-1) .

MODERN PUBLICATION-MOCK TEST PAPER - 1-MCQs
  1. M is a metal which forms an oxide, M(2)O and (1)/(2) M(2)O(s) rarr M(s...

    Text Solution

    |

  2. Consider the galvanic cell : Pb(s) | Pb^(2+) (aq) (x1 M)| | Cu^(2+)...

    Text Solution

    |

  3. 1.25 of sample of C Cl2F2 was cooled at a constant pressure of 1 atm. ...

    Text Solution

    |

  4. Co-ordination number of cations in rock salt structure of NaCl is :

    Text Solution

    |

  5. Which of the following will show a negative deviation from Raoult's la...

    Text Solution

    |

  6. Arragne in decreasing order of stability :

    Text Solution

    |

  7. Which of the following contains S - S linkage ?

    Text Solution

    |

  8. Electrolysis of water with 1 Faraday electricity gives :

    Text Solution

    |

  9. Which one of the following is wrong about molecularity of a reaction ?

    Text Solution

    |

  10. A2 (g) + B2(g) hArr 2AB(g). The equilibrium constant of above react...

    Text Solution

    |

  11. The difference between the boiling point and freezing point of an aque...

    Text Solution

    |

  12. The coagulating power of clcctrolytcs having inos Na ^(+), Al ^(3+) an...

    Text Solution

    |

  13. Phosphine can be prepared by the reaction of water with :

    Text Solution

    |

  14. A balloon has a volumn of 10 L at a pressure of 1 atm. When the balloo...

    Text Solution

    |

  15. The reaction between A to B is not feasible but on changing entropy th...

    Text Solution

    |

  16. Which of the following does not give oxygen on heating ?

    Text Solution

    |

  17. In Fe(CO)5," the " Fe larr CO a bond results by the overlap between fi...

    Text Solution

    |

  18. In a system. A(s)+B(g)+ Heat rarr 2C(s)+2D(g) equilibrium is ...

    Text Solution

    |

  19. When a photoelectric substance was irradiated with a light of frequenc...

    Text Solution

    |

  20. Under identical conditions, the S(N^(1)) reaction will occur most effi...

    Text Solution

    |