Home
Class 11
CHEMISTRY
Calculate Delta H for the reaction 2O(2)...

Calculate `Delta H` for the reaction `2O_(2)(g) rarr 3O_(2)(g)` at 298 K and 1 atmosphere pressure given that `Delta U = -287.9 kJ` and `R = 8.314 JK^(-1) mol^(-1)`.

Text Solution

Verified by Experts

As per the equation `Delta H = Delta U + Delta n RT`, where
`Delta U = -287.9 kJ, Delta n = (3-2) = 1, R = 8.314 JK^(-1) mol^(-1), T = 298K , Delta H = ?`
`Delta H = -287.9 kJ + 1 xx 8.314 xx 10^(-3) KJ K^(-1) mol^(-2) xx 298 K`
`= -285.4 kJ mol^(-1)`
Change in enthalpy for the reaction `= -285.4 kJ mol^(-1)`.
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL THERMODYNAMICS

    SUBHASH PUBLICATION|Exercise Three mark questions and answers|25 Videos

  • CHEMICAL EQUILIBRIUM

    SUBHASH PUBLICATION|Exercise NUMERICAL PROBLEMS|34 Videos

  • CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES

    SUBHASH PUBLICATION|Exercise THREE MARKS more than 3 marks|21 Videos

Similar Questions

Explore conceptually related problems

For the reaction H_(2)O_((i))hArrH_(2)O_((g)) at 373 K and 1 atmospheric pressure

For the reaction : C_(3)H_(8)(g) + 5O_(2) rarr 3CO_(2)(g) + 4H_(2)O(l) a constant temperature, Delta H - Delta U is

For the equilibirum, PCl_(5)(g) hArr PCl_(3)(g) + Cl_(2)(g) at 298 K, K = 1.8 xx 10^(-7) . Calculate Delta G^(@) for the reaction (R = 8.314 JK^(-1) mol^(-1)) .

Calculate the standard free energy change Delta G^(@) for the reaction, 2HgO(s) rarr 2Hg(l) + O_(2)(g) Delta H^(@) = 91 kJ mol^(-1) at 298 K, S_((HgO))^(@) = 72.0 JK^(-1) mol^(-1) .

Calculate Delta H^(theta) for the reaction : H_(2)O (l) rarr H_(2)(g) + (1)/(2) O_(2) (g) Given 2H_(2)(g) + O_(2)(g) rarr 2H_(2)O(l) Delta H = -571.6 kJ

Calculate Delta_(r ) G^(@) for the conversion of oxygen to ozone, (3)/(2)O_(2) (g) rarr O_(3) at 298 K , given partial pressure equilibrium constant is 2.47 xx 10^(-29) .

Calculate the Delta H at 298 K for the reaction (1)/(2)N_(2)(g) + (3)/(2)H_(2)(g) rarr NH_(3)(g) given that Delta H for the formation of NH_(3) has a valve of -46.0 kJ mol^(-1) (R = 8.314 JK^(-1) mol^(-1)) .

For the reaction : C_(2)H_(4)(g) + 3 O_(2)(g) rarr 2 CO_(2)(g) + 2 H_(2)O(l) at 298 K, Delta U = - 1415 kJ . If R = 0.0084 kJ K^(-1) . Then Delta H is equal to

SUBHASH PUBLICATION-CHEMICAL THERMODYNAMICS-Numerical problems :
  1. Calculate the standard free energy for a reaction X hArr Y, if the val...

    Text Solution

    |

  2. Calculate the standard Gibb's energy change for a reaction at 298 K, i...

    Text Solution

    |

  3. Equilibrium constant of a reaction is 0.008. Calculate the standard Gi...

    Text Solution

    |

  4. Standard Gibb's energy change of a reaction is 62 kJ/mole. Calculate t...

    Text Solution

    |

  5. For a reaction A + B rarr C + D, the entropy change is +68.4 JK^(-1) a...

    Text Solution

    |

  6. Enthalpy change and entropy change of a chemical reaction are -10.5 kJ...

    Text Solution

    |

  7. For the reaction, N(2)(g) + 3H(2)(g) rarr 2NH(3)(g), Delta H = -95.2 k...

    Text Solution

    |

  8. One mole of an ideal gas at 27^(@)C undergoes isothermal expansion rev...

    Text Solution

    |

  9. Three moles of an ideal gas at 27^(@)C are compressed reversibly and i...

    Text Solution

    |

  10. Three moles of helium gas at one atmosphere are compressed reversibly ...

    Text Solution

    |

  11. One mole of an ideal gas expands isothermally and reversibles from 5 a...

    Text Solution

    |

  12. Calculate the enthalpy of formation of methanol from the following dat...

    Text Solution

    |

  13. When one mole of gaseous methane s burnt in excess of gaseous oxygen, ...

    Text Solution

    |

  14. Calculate Delta(r ) G^(@) for the conversion of oxygen to ozone, (3)/(...

    Text Solution

    |

  15. Calculate Delta H for the reaction 2O(2)(g) rarr 3O(2)(g) at 298 K and...

    Text Solution

    |

  16. Calculate the Delta H at 298 K for the reaction (1)/(2)N(2)(g) + (3)/(...

    Text Solution

    |

  17. Enthalpy of combustion of benzene is -3267 kJ mol^(-1). Calculate enth...

    Text Solution

    |

  18. Calculate Delta(r )G^(@) for the reaction for which the value of K(p) ...

    Text Solution

    |

  19. Delta G^(@) of a reaction is 120 kJ mol^(-1). Calculate the K(p) at 20...

    Text Solution

    |

  20. Standard free energy change of a reaction is +150 kJ mol^(-1). Calcula...

    Text Solution

    |