Home
Class 11
CHEMISTRY
For a reaction A + B rarr C + D, the ent...

For a reaction `A + B rarr C + D`, the entropy change is `+68.4 JK^(-1)` and the enthalpy change is -124.6 kJ. Calculate the Gibb's energy change at 298 K.

Text Solution

Verified by Experts

`Delta G = Delta H - T Delta S`
Given, `Delta H = -1246000 J, T = 298 K` and `Delta S = +68.4 JK^(-1)`
Substituting in the formula, we get
`Delta G = -124600 - 298 xx 68.4`
`= -144983 J = -144.983 kJ`.
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

Equilibrium constant of a reaction is 0.008. Calculate the standard Gibb's energy change at 298 K.

For a reaction, X + Y rarr Z there is no entropy charge. Enthaply change for the reaction is 100J mol^(-1) . Delta G is

Free energy is related to enthalpy and entropy changes as :

Standard Gibb's energy change of a reaction is 62 kJ/mole. Calculate the equilibrium constant at 300 K.

For the reaction, N_(2)(g) + 3H_(2)(g) rarr 2NH_(3)(g), Delta H = -95.2 kJ and Delta S = -198.1 JK^(-1) . Calculate the temperature at which Gibb's energy change of the reaction (Delta G) becomes equal to zero.

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

    |