Home
Class 12
CHEMISTRY
For the hypothetical reaction A(2)(g) +...

For the hypothetical reaction `A_(2)(g) + B_(2)(g) hArr 2AB(g)`
If `Delta_(r)G^(@)` and `Delta_(r)S^(@)` are `20 JK^(-1)mol^(-1)` respectively at `200` K.
`Delta_(r)C_(p)` is `20 JK^(-1) mol^(-1)` then `Delta_(r)H^(@) "at" 400 K ` is :

A

`20` KJ/mol

B

`7.98` KJ/mol

C

`28` KJ/mol

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
`(A) DeltaG_(200)^(@) = DeltaH_(200)^(@) - TDeltaS_(200)^(@)`
`DeltaH_(200)^(@) = 20-4 = 16 KJ//"mol"`
`DeltaH_(T_(2))^(@) = DeltaH_(T_(1))^(@) + DeltaC_(p)[t_(2)-T_(1)]`
`DeltaH_(400)^(@) = DeltaH_(200)^(@) + (20 xx 200)/(1000) KJ//"mol" = 16 + 4=2 KJ//"mol"`.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    RESONANCE|Exercise exercise-2 Part:(II): Single and Double value integer type|13 Videos

  • THERMODYNAMICS

    RESONANCE|Exercise exercise-2 Part:(III): One or more than one options correct|10 Videos

  • THERMODYNAMICS

    RESONANCE|Exercise exercise-3 Part:(III) : Match the column|3 Videos

  • TEST SERIES

    RESONANCE|Exercise CHEMISTRY|50 Videos

Similar Questions

Explore conceptually related problems

For the hypothetical reaction A_(2)(g)+B_(2)(g) to 2AB_(g) DeltaG_(r)^(@)" and " DeltaS_(r)^(@)" are " 20KJ//moland-20JK^(-1)mol^(-1) "respectively at" 200K Delta_(r)C_(r)" is "JK^(-1) " then " DeltaH_(r)^(@) "at" 400K is

For the reation at 300 K A(g)hArrV(g)+S(g) Delta_(r)H^(@)=-kJ//mol, Delta_(r)S^(@)=-0.1K^(-1).mol^(-1) What is the value of equilibrium constant ?

For the reaction at 300K A(g) hArr V(g)+S(g) Delta_(r) H^(@)=-30kJ //mol , Delta_(r)S^(@)=-0.1Kj.k^(-1).mol^(-1) What is the value of equilibrium constant ?

For the reaction: CO(g) +H_(2)O(g) hArr CO_(2)(g) +H_(2)(g) (Delta_(r)H)_(300K) = 41.2 kJ mol^(-1) (Delta_(r)H)_(1200K) =- 33.0 kJ mol^(-1) (Delta_(r)S)_(300K) = -4.2 xx 10^(-2) kJ mol^(-1) (Delta_(r)S)_(1200K) =- 3.0 xx10^(-2) kJ mol^(-1) Predict the direction of spontaneity of the reaction at 300K and 1200K . also calculated log_(10)K_(p) at 300K and 1200K .

For the reaction A(g) +B_2(g)rarr AB_2(g) , DeltaS=110JK^(-1) mol^(-1) , DeltaH=55KJ mol respectively Reaction will be spontanuos at

For the reaction, A(g) + B_2(g) rarr AB_2(g), delta S = 110 JK^(-1) mol^(-1), delta H = 55 kg/mol. Reaction will be spontaneous at

For a hypothetical reaction A(g) + 3B(g) to 2C(g). Delta H = -100 kJ and Delta S = -200 Jk^(-1) . Then the temperature at which the reaction will be in equilibrium is

RESONANCE-THERMODYNAMICS-exercise-2 Part:(I) :Only one option correct
  1. If a refrigerator's door is opened , then we get

    Text Solution

    |

  2. Which of the following statement (s) is correct? Statement-I: The en...

    Text Solution

    |

  3. During winters , moisture condenses in the form of dew and can be seen...

    Text Solution

    |

  4. Which of the following option the first compound has less entropy than...

    Text Solution

    |

  5. Select the correct statenent (s) : S(1) : AICI(3) when dissolve in H...

    Text Solution

    |

  6. When CH(3)OH(l) is mixed in water:

    Text Solution

    |

  7. Although graphite is thermodynamically most stable allotrope of Carbon...

    Text Solution

    |

  8. Isoentropic process is

    Text Solution

    |

  9. According to third law of thermodynamics

    Text Solution

    |

  10. One mole of an ideal diatomic gas (C(v) =5 cal) was transformed from i...

    Text Solution

    |

  11. By how much does the entropy of 3 mole of an ideal gas change in goin...

    Text Solution

    |

  12. For a perfectly crystalline solid C(p.m.)=aT^(3)+bT,where a and b cons...

    Text Solution

    |

  13. The hydrolysis of Adienosine triphisphate [ATP] to give adienosine dip...

    Text Solution

    |

  14. Select correct statements: S(1) : For every chemical reaction at equ...

    Text Solution

    |

  15. Combustion of sucrose is used by aerobic organisms for providing energ...

    Text Solution

    |

  16. Given the following data: {:("Substance", DeltaH^(@)"(KJ//mol)", S^(...

    Text Solution

    |

  17. For the hypothetical reaction A(2)(g) + B(2)(g) hArr 2AB(g) If Delt...

    Text Solution

    |

  18. NH(4)CI(s) + aq rarr NH(4)^(+)(aq) + CI^(-1)(aq) DeltaH=+15.1 KJ mol...

    Text Solution

    |