Home
Class 11
CHEMISTRY
H(2(g)) rarr 2H((g)) , DeltaH = 400 KJ ,...

`H_(2(g)) rarr 2H_((g)) , DeltaH = 400 KJ `, then `DeltaS_("system")` at 2000 K is

A

`0.2 KJ//mol//K`

B

` -0.2 KJ//mol//K`

C

`200 KJ//g//K`

D

`-400 KJ//mol//K`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE - 2 (ENTROPY AND GIBBS ENERGY)|15 Videos

  • CHEMICAL THERMODYANMICS

    AAKASH SERIES|Exercise Questions For Descriptive Answers|28 Videos

  • ELECTRON MIGRATION EFFECTS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|10 Videos

Similar Questions

Explore conceptually related problems

For the real gases reaction 2CO_((g)) + O_(2(g)) rarr 2CO_(2(g)), Delta H = - 560kJ . In a 10L rigid vessel at 500K, the initial pressure is 70 bar and after reaction it becomes 40 bar. The change in internal energy is:

1) C_("Graphite") + O_(2(g)) rarr CO_(2(g)) , DeltaH = -94 K.Cals 2) C_("Diamond") + O_(2(g)) rarr CO_(2(g)) , DeltaH =-94.5 K.Cals From the above data the heat of transition of C_("diamond") rarr C_("Graphite")

CH_(4(g)) + 2O_(2(g)) rarr CO_(2(g)) + 2H_2O_((l)) DeltaH = -200 K.cal , now DeltaE Cal, now DeltaE for the same process at 300 K (in K.Cal)

For the reaction: 2H_(2(g)) + O_(2(g)) rarr 2H_2O_((g)) , DeltaH = -571 kJ bond energy of (H-H) = 435 kJ, of (O = O) = 498kJ , then the average bond energy of O-H bond using the above data

Given C_((s)) + O_(2(g)) rarr CO_(2(g)), Delta H = -395 kJ , S_((g)) + O_(2(g)) rarr SO_(2(g)) , Delta H = -295 kJ , CS_(2(l)) + 3O_(2(g)) rarr CO_(2(g)) + 2SO_(2(g)) , Delta H = -1110 kJ The heat of formation of CS_(2(l)) is

For the reaction 2H_(2(g)) + o_(2(g)) rarr 2H_(2)O_((g)), Delta H^(@) = - 573.2 kJ . The heat of decomposition of water per mol is:

2H_(2(g)) + O_(2(g)) rarr 2H_(2)O_((l)) , DeltaH= -ve and DeltaG= -ve . Then the reaction is

2C_((s)) + 1/2O_(2(gg) rarr CO_(2(g)) , DeltaH = -787 KJ H_(2(g)) + 1/2O_(2(g)) rarr H_2O_((l)) , DeltaH = -286 KJ C_2H_(2(g)) + 2 1/2O_(2(g)) rarr 2CO_(2(g)) + H_2O_((l)) , DeltaH = -1301 KJ . Heat of formation of acetylene in KJ is

AAKASH SERIES-CHEMICAL THERMODYNAMICS-PRACTICE EXERCISE
  1. The enthalpy of formation of ammonia is -46.0 KJ mol^(-1). The enthalp...

    Text Solution

    |

  2. Which of the following bond has highest enthalpy

    Text Solution

    |

  3. 2C((s))  + 1/2O(2(gg) rarr CO(2(g)) , DeltaH = -787 KJ H(2(g)) + 1/2...

    Text Solution

    |

  4. Heats of combustion of C2H4, H2 and C2H6 are -1409 K.J, -285 K.J and -...

    Text Solution

    |

  5. The enthalpy of combustion of cyclohexane cyclohexene and H2 are respe...

    Text Solution

    |

  6. Given that CH3CHO + 5/2O2 rarr 2CO2 + 2H2O, DeltaH = -1168 KJ//"mole...

    Text Solution

    |

  7. The enthalpy of vapourisation of a liquid is 30 KJ mol^(-1) and entrop...

    Text Solution

    |

  8. H(2(g)) rarr 2H((g)) , DeltaH = 400 KJ , then DeltaS("system") at 2000...

    Text Solution

    |

  9. Show that A ∪ B = A ∩ B implies A = B

    Text Solution

    |

  10. Standard molar entropies of Mg((s)) , C((s)), MgO((s)) & CO((g)) respe...

    Text Solution

    |

  11. DeltaH and DeltaS for certain reaction are -10KJ and - 44J/K, DeltaG^@...

    Text Solution

    |

  12. S^@ of N2, H2 and NH3 respectively are 190, 130 & 111 J/K/mol, then D...

    Text Solution

    |

  13. Kp for the reaction 3/2O(2(g)) overset(rarr)(larr)O(3(g)) at 25^@C is ...

    Text Solution

    |

  14. Zn((s)) + Cu((aq))^(+2) -> Cu((s)) + Zn((aq))^(+2), DeltaG = -XKJ, C...

    Text Solution

    |

  15. For a process change in enthalpy is 36 kJ.mol and change in entropy is...

    Text Solution

    |

  16. For which of the following cases DeltaS = (DeltaH)/T

    Text Solution

    |

  17. Calculate work done when 1 mole of an ideal gas is expanded reversibly...

    Text Solution

    |

  18. The entropy change in adiabatic process is

    Text Solution

    |

  19. If w1, w2, w3, and we are work done in isothermal adiabatic, isobaric ...

    Text Solution

    |

  20. Molar heat capacity (C(p)) of water of constant pressure is 75JK^(-1) ...

    Text Solution

    |