Home
Class 12
CHEMISTRY
The free energy for a reaction having De...

The free energy for a reaction having `DeltaH=31400` cal, `DeltaS=32" cal "K^(-1)mol^(-1)` at `1000^(@)C` is:

A

`-9336cal`

B

`-7386cal`

C

`-1936cal`

D

`+9336cal`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaG=DeltaH-TDeltaS=31400-1273xx32=-9336kcal`
Promotional Banner

Topper's Solved these Questions

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Miscellaneous Numerical Examples|22 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Practice problems|81 Videos

  • Chemical Thermodynamics and Thermochemistry

    OP TANDON|Exercise Solved Example|74 Videos

  • CHEMICAL KINETICS

    OP TANDON|Exercise LINKED COMPRESHENSION TYPE QUESTIONS ( SECTION-VI)|4 Videos

  • CLASSIFICATION AND NOMENCLATURE OF ORGANIC COMPOUNDS

    OP TANDON|Exercise INTEGER|2 Videos

Similar Questions

Explore conceptually related problems

The change in Gibbs free energy of the system alone provides a criterion for the spontaneity of a process at constant temperature and pressure. A change in the free energy of a system at constant temperature and pressure will be : DeltaG_("system")=DeltaH_("system")-T DeltaS_(system") The free energy for a reaction having DeltaH=31400 cal, DeltaS=32 cal L^(-1) mol^(-1) at 1000^(@)C

A change in the free energy of a system at constant temperature and pressure will be: Delta_(sys)G = Delta_(sys)H -T Delta_(sys)S At constant temperature and pressure Delta_(sys) G lt 0 (spontaneous) Delta_(sys)G = 0 (equilibrium) Delta_(sys)G gt 0 (non-spontaneous) The free enegry for a reaction having DeltaH = 31400 cal, DeltaS = 32 cal K^(-1) mol^(-1) at 1000^(@)C is

The half-life period for first order reaction having activation energy 39.3 k cal mol^(-1) at 300^@ C and frequency constant 1.11xx10^(11) s^-1 will be

The values of DeltaH and DeltaS for two reactions are given below: Reaction A : DeltaH =- 10.0 xx 10^(3)J mol^(-1) DeltaS = +30 J K^(-1) mol^(-1) Reaction B: DeltaH =- 11.0 xx 10^(3)J mol^(-1) DeltaS =- 100J K^(-1) mol^(-1) Decide whether these reactions are spontaneous or not at 300K .

The equilibrium constant K_(p) for a homogeneous gaseous reaction is 10^(-8) . The standard Gibbs free energy change DeltaG^(ɵ) for the reaction ("using" R=2 cal K^(-1) mol^(-1)) is

The value of DeltaH and DeltaS for two reactions are given below : Reaction A : DeltaH = -10.5 xx 10^(3) J "mol"^(-1) DeltaS = + 31 J K^(-1) "mol"^(-1) Reaction B : DeltaH = -11.7 xx 10^(3) J "mol"^(-1) DeltaS = -105 J K^(-1) "mol"^(-1) Decide whether these reactions are spontaneous or not at 298 K.

The equilibrium constant K_(p) for the homogeneous reaction is 10^(-3) . The standard Gibbs free energy change DeltaG^(ɵ) for the reaction at 27^(@)C ("using" R=2 cal K^(-1) mol^(-1)) is

For the reaction: X_(2)O_(4)(l)rarr2XO_(2)(g) DeltaU=2.1 cal , DeltaS =20 "cal" K^(-1) "at" 300 K Hence DeltaG is

The equilibrium constant for certain reaction is 100 . If the value R is given to be 2 cal K^(-1) mol^(-1) , then standard Gibb's free energy change will be

OP TANDON-Chemical Thermodynamics and Thermochemistry-Illustrations of Objective Questions
  1. Melting point of a solid is x K and its latent heat of fusion is 600 c...

    Text Solution

    |

  2. The entropy change involved in the conversion of 1 mole of liquid wate...

    Text Solution

    |

  3. The free energy for a reaction having DeltaH=31400 cal, DeltaS=32" cal...

    Text Solution

    |

  4. F(2)C=CF-CF = CF(2) rarr F(2)underset(FC=)underset(|)(C)-underset(CF)u...

    Text Solution

    |

  5. For the equilibrium reaction, the value of Gibbs free energy change is...

    Text Solution

    |

  6. At 0^(@)C ice and water are in equilibrium and DeltaH=6kJ" "mol^(-1) f...

    Text Solution

    |

  7. For a reaction, Ag(2)O(s)hArr2Ag(s)+(1)/(2)O(2)(g) DeltaH,DeltaS a...

    Text Solution

    |

  8. For the homogeneous reactions: xA+yBtolY+mZ DeltaH=-30kJ" "mol^(-1...

    Text Solution

    |

  9. For the reaction CO (g) + (1)/(2) O(2) (g) rarr CO(2) (g) Delta H ...

    Text Solution

    |

  10. For a reaction DeltaH=+29kJ" "mol^(-1),DeltaS=-35KJ^(-1)" "mol^(-1) ...

    Text Solution

    |

  11. What is DeltaG^(@) for the reaction? (1)/(2)N(2)(g)+(3)/(2)H(2)(g) ...

    Text Solution

    |

  12. What is the sign of DeltaG^(Theta) and the values of K for an electroc...

    Text Solution

    |

  13. The free energy of formation of NO is 78 kJ mol^(-1) at the temperatur...

    Text Solution

    |

  14. Equilibrium constant for the reaction: H(2)(g) +I(2) (g) hArr 2HI(g)...

    Text Solution

    |

  15. Standard Gibbs free enegry change DeltaG^(Theta) for a reaction is zer...

    Text Solution

    |

  16. The standard free energy change of a reaction is DeltaG^(@)=-115 at 29...

    Text Solution

    |

  17. For which of the following reactions, the entropy change will be posit...

    Text Solution

    |

  18. If an endothermic reaction occurs spontaneously at constant T and P, t...

    Text Solution

    |

  19. Which is the correct expression that relates changes of entropy with t...

    Text Solution

    |

  20. The correct statement regarding entropy is:

    Text Solution

    |