Home
Class 12
CHEMISTRY
When enthalpy and entropy change for a c...

When enthalpy and entropy change for a chemical reaction are `-2.5 xx10^(3)` cals and `7.4` cals `deg^(-1)` respectively. Predict that reaction at 298 K is

A

spontaneous

B

reversible

C

irreversible

D

non-spontaneous

Text Solution

Verified by Experts

The correct Answer is:
A
`DetlaG=DeltaH-TDeltaS`
`=-2500-298xx7.4=-2500-2205`
`=-4705 cal`
Since `DeltaG` is negative, the reaction is spontaneous
Promotional Banner

Topper's Solved these Questions

  • CHEMICAL KINETICS

    DINESH PUBLICATION|Exercise Additional Numerical Problems For Practice|16 Videos

  • CHEMISTRY IN EVERY DAY LIFE

    DINESH PUBLICATION|Exercise Unit test-9|50 Videos

Similar Questions

Explore conceptually related problems

Enthalpy and entropy changes of reaction are 40.63 kJ mol^(-1) and 108.8 J K^(-1) mol^(-1) , respectively. Predict the feasibility of the reaction at 27^(@)C .

The enthalpy and entropy change for the reaction, Br_2(l) + Cl_2(g) - 2BrCl(g) are 7.1 kcal mol^-1 and 25 cal K^-1 mol^-1 respectively. This reaction will be spontaneous at

For a reaction at 25^(@)C enthalpy change (Delta H) and entropy change (Delta S) are -11.7xx10^(3)Jmol^(_1) and -105 J mol^(-1)K^(-1) respectively. The reaction is :

For a reaction at 25^(@)C enthalpy change (DeltaH) and entropy change (DeltsS) are -11.7 K J mol^(-1) and -105J mol^(-1) K^(-1) , respectively. Find out whther this reaction is spontaneous or not?

DINESH PUBLICATION-CHEMICAL THERMODYNAMICS AND CHEMICAL ENERGETICS -Exercise
  1. Given : S((s))+(3)/(2)O(2(g))rarrSO(3(g)+2X Kcal SO(2(s))+(1)/(2)O(2...

    Text Solution

    |

  2. NH(3)(g)+3Cl(2)toNCl(3)(g)+3HCl(g),DeltaH(1) N(2)(g)+3H(2)(g)to2NH(3...

    Text Solution

    |

  3. When enthalpy and entropy change for a chemical reaction are -2.5 xx10...

    Text Solution

    |

  4. The bond dissociation energy of gaseous H(2),Cl(2) and HCl are 104,58 ...

    Text Solution

    |

  5. At constant TandP,Which of the following statements is correct for the...

    Text Solution

    |

  6. A reaction is not feasible if

    Text Solution

    |

  7. One mole of an ideal gas at 300K is expanded isothermally from an init...

    Text Solution

    |

  8. Identify the correct statement regarding entropy

    Text Solution

    |

  9. The reaction is sontaneous if the cell potential is

    Text Solution

    |

  10. In an endothermic reaction, the value of DeltaH is

    Text Solution

    |

  11. Enthalpy of an exothermic reaction is always

    Text Solution

    |

  12. DeltaH for solid to liquid transitions for protein A and B are 2.73 kc...

    Text Solution

    |

  13. The heat absored at constant volume is equal to the system's change in

    Text Solution

    |

  14. Which of the following holds good to the laws of thermodynamics for th...

    Text Solution

    |

  15. For a melting of a solid at 25^(@)C, the fusion process requires energ...

    Text Solution

    |

  16. The difference between Delta H and Delta U for the combustion of metha...

    Text Solution

    |

  17. The heat of neutralisation is maximum when

    Text Solution

    |

  18. According to the second law of thermodynamics, a process (reaction) is...

    Text Solution

    |

  19. The law of thermodynamics that provides the basis for the determinatio...

    Text Solution

    |

  20. The heat of combustion of graphite and carbon monoxide respectively ar...

    Text Solution

    |