Home
Class 12
CHEMISTRY
For hypothetical reversible reaction 1...

For hypothetical reversible reaction
`1//2A_(2)(g) +3//2B_(2)(g) rarr AB_(3)(g), DeltaH =- 20 kJ` if standard entropies of `A_(2),B_(2)`, and `AB_(3)` are `60,40` and `50JK^(-1) mol^(-1)` respectively. The above reaction will be equilibrium at

A

400 K

B

500 K

C

250 K

D

200 K

Text Solution

Verified by Experts

The correct Answer is:
B
`(1)/(2)A_(2(g))+(3)/(2)B_(2(g))rarr AB_(3(g)) , Delta H = - 20 KJ`
`Delta S^(@)=Sigma (S^(@))_(P)-Sigma (S^(@))_(R )`
`=50-((1)/(2)xx60+(3)/(2)xx40)`
`Delta S^(@)=-40 JK^(-1)mol^(-1)`
at equilibrium `Delta G = 0`
`therefore Delta H = T. Delta S`
`T =(+20xx1000)/(-40)=500K`
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -3|108 Videos

  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -4|18 Videos

  • THERMODYNAMICS

    ALLEN|Exercise EXERCISE -1B|22 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 reversible reaction : X_((g))+3Y_((g))hArr 2Z_((g)), DeltaH=-"40 kJ" Standard entropies of X, Y and Z are 60, 40and "50 J K"^(-1)",ol"^(-1) respectively. The temperature at which the above reaction is in equilibrium is

For the reaction (1)/(2) N_(2)(g) + (3)/(2) H_(2)(g) rarr NH_(3)(g), DeltaH =-30 KJ to be at equilibrium at 477^(@) C. If standard entropy of N_(2)(g) and NH_(3)(g) are 60 and 50 "J" "mole"^(-1)K^(-1) respectively then calculate the standard entropy of H_(2)(g) in "J mole"^(-1) K^(-1).

For a hypothetical reaction of kind. AB_(2)(g)+1/2 B_(2)(g) hArr AB_(3)(g), DeltaH=-x kJ More AB_(3) could be produceed at equilibrium by

For the reaction, 2NO_(g) + O_(2)(g) rarr 2NO_(2)(g) Calculate DeltaG at 700K when enthalpy and entropy changes are -113.0 kJ mol^(-1) and -145 J K^(-1) mol^(-1) , respectively.

The enthalpy and entropy change for the reaction, Br_(2)(l)+Cl_(2)(g)rarr2BrCl(g) are 30KJmol^(-1) and 105JK^(-1)mol^(-1) respectively. The temperature at which the reaction will be in equilibrium is:

In a reaction A_(2)(g)+4B_(2)(g) hArr 2AB_(4)(g), DeltaH lt 0 . The formation of AB_(4) is not favoured by

The enthalpy and entropy change for the reaction: Br_(2)(l) + Cl_(2)(g) to 2BrCl(g) are 30 kJ mol^(-1) and 105 JK^(-1) mol^(-1) respectively. The temperature at which the reaction will be in equilibrium is:-

The enthalpy and entropy change for the reaction, Br_(2)(l)+Cl_(2)(g)rarr2BrCl(g) are 30KJmol^(-1) and 105JK^(-1)mol^(-1) respectively. The temperature at which the raction will be in equilibrium is:

The enthalpy and entropy change for the reaction Br_(2)(l) + Cl_(2)(g) rightarrow 2BrCl(g) are 40 kJ mol^(-1) and 110 JK^(-1) mol ^(-1) repectively. The temperature at which the reaction will be in equilibrium is

For the reaction N_(2)(g) + 3H_(2)(g) rarr 2NH_(3)(g) , DeltaH = -93.6 KJ mol^(-1) the formation of NH_(3) is expected to increase at :

ALLEN-THERMODYNAMICS -EXERCISE -2
  1. Which of the following is true fo the reacion H(2)O(l)hArr H(2)O(g) at...

    Text Solution

    |

  2. For the reaction Ag(2)O(s) to 2Ag(s)+1/2 O(2)(g) the value of triangle...

    Text Solution

    |

  3. For hypothetical reversible reaction 1//2A(2)(g) +3//2B(2)(g) rarr A...

    Text Solution

    |

  4. For the precipitation of AgCl by Ag^(+) ions and HCl

    Text Solution

    |

  5. What is the sign of Delta G for the process of ice melting at 283 K ?

    Text Solution

    |

  6. What is the free energy change triangleG when 1.0 mole of water at 100...

    Text Solution

    |

  7. A reaction A +B rarr C+D +q is found to have a positive entropy change...

    Text Solution

    |

  8. Equilibrium constant of a reaction is related to :

    Text Solution

    |

  9. van't Hoff equation is

    Text Solution

    |

  10. If G^(@) gt 0 for a reaction then

    Text Solution

    |

  11. The equilibrium constant for a reaction is 10. What will be the value ...

    Text Solution

    |

  12. When the value of entropy is greater then the ability for useful work ...

    Text Solution

    |

  13. The process of evaporation of a liquid is accompanied by

    Text Solution

    |

  14. For the process, CO(2)(s) to CO(2)(g)

    Text Solution

    |

  15. Which of the following provide exceptions to third law of thermodynami...

    Text Solution

    |

  16. The Gibbs free energy change of a reaction at 27^(@)C is -26 Kcal. and...

    Text Solution

    |

  17. Which of the following reaction is expected never to be spontaneous :-

    Text Solution

    |

  18. The Joule. Thomson expansion of a gas is an

    Text Solution

    |

  19. In case of an ideal gas, Joule Thomson coefficient is -

    Text Solution

    |

  20. Inversion temperature is

    Text Solution

    |