Home
Class 12
CHEMISTRY
Although DeltaS for the formation of two...

Although `DeltaS` for the formation of two moles of water from `H_2` and `O_2` is = -327 JK-1 it is spontaneous.Explain `(Given Delta H for the reaction is -572KJ)`

Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics

    CHETANA PUBLICATION|Exercise EXERCISE|95 Videos
  • CHEMICAL KINETICS

    CHETANA PUBLICATION|Exercise EXERCISE|112 Videos
  • COORDINATION COMPOUNDS

    CHETANA PUBLICATION|Exercise EXERCISE|179 Videos

Similar Questions

Explore conceptually related problems

(Delta H - Delta U) for the formation of carbon monoxide (CO) from its elements at 298K is (R = 8.314 K^(-1)mol^(-1))

Explain the formation of H_2 molecule on the basis of valence bond theory.

If the standard molar enthalpy of formation of CaO_((s)), CO_(2(g)) "and" CaCO_(3(s)) is -635, -393 "and" -1207 kJ mol^-1 respectively, the Delta_r H^@ in kJ mol^-1 for the reaction CaCO_(3(s)) to CaO_((s)) + CO_(2(g)) is ________ .

The heat change Delta H for the reaction 2 CO +O_2to 2 CO_2, Delta H=-135 kcal is called ______ .

For the reaction, C_2H_4(g) + H_2(g)rarr C_2H_6(g), K_p= 3.356 xx 10^(17) Calculate Delta G° for the reaction at 25^@C .

The enthalpy change for the formation of 3.6 kg water is _____ . H_(2(g))+1/2 O_(2(g)) to H_2 O_((l)), Delta H=-284.5 kJ mol^-1

Write thermochemical equation for complete oxidation of one mole of H_2(g) . Standard enthalpy change of the reaction is -286 kJ. Is the value -286 kJ, enthalpy of formation or enthalpy of combustion or both? Explain.

Conversion of oxygen to ozone represented by the equation 3 O_2 to 2 O_3 is an endothermic reaction. Enthalpy change Delta H accompanying the reaction _________ .

Although both CO_2 and H_2O are triatomic molecules, the shape of H_2O molecules is bent while that of CO_2 is linear. Explain this on the basis of dipole moment.

For a certain reaction DeltaH = - 25 kJ and DeltaS = - 40 JK^(-1) . At what temperature will it change from spontaneous to non-spontaneous reaction?

CHETANA PUBLICATION-Chemical Thermodynamics-EXERCISE
  1. Although DeltaS for the formation of two moles of water from H2 and O2...

    Text Solution

    |

  2. The correct thermodynamic conditions for the spontaneous reaction at a...

    Text Solution

    |

  3. A gas is allowed to expand in a well insulated container against a con...

    Text Solution

    |

  4. In which of the following entropy of the system decreases?

    Text Solution

    |

  5. The enthalpy of formation for all elements in their standard state is

    Text Solution

    |

  6. Which of the following reaction is exothermic ?

    Text Solution

    |

  7. 6.24 g of ethanol are vaporized by supplying 5.89kJ of heat.Enthalpy o...

    Text Solution

    |

  8. If the standard enthalpy of formation of methanol is -238.9 kJ mol^(-1...

    Text Solution

    |

  9. For vaporization of water at 1bar,DeltaH=40.63kJ mol^(-1)and DeltaS = ...

    Text Solution

    |

  10. Bond enthalpies of H-H, Cl-Cl and H-Cl bonds are 434 kj mol^(-1), 242 ...

    Text Solution

    |

  11. Which of the following is not a state function?

    Text Solution

    |

  12. Which of the following is not an extensive property?

    Text Solution

    |

  13. An endothermic reaction is one in which heat content of

    Text Solution

    |

  14. In a chemical reaction, work is done by the system when

    Text Solution

    |

  15. Which of the following is an intensive property?

    Text Solution

    |

  16. When a sample of an ideal gas is allowed to expand at constant tempera...

    Text Solution

    |

  17. A gas of 0.320 kJ works on its surroundings and absorbs 120 J of heat ...

    Text Solution

    |

  18. In the reaction, H2 + Cl2 rarr 2HCl DeltaH =-184 kJ, if 2 moles of H2 ...

    Text Solution

    |

  19. The enthalpies of formation of N2O and NO at 298 K are 82 and 90 kJ mo...

    Text Solution

    |

  20. For which of the following substances DeltafH^@ is not zero.

    Text Solution

    |

  21. If for a reaction, DeltaH is negative and DeltaS is positive then the ...

    Text Solution

    |