Home
Class 12
CHEMISTRY
The value of DeltaH("transition") of C (...

The value of `DeltaH_("transition")` of C (graphite) `rarr` C (diamond) is 1.9 kJ/mol at `25^(@)C`. Entropy of graphite is higher than entropy of diamond. This implies that :

A

C(diamond) is more thermodyanically stable than C (graphite) at `25^(@)` C

B

C(graphite) is more thermodyanically stable than C (diamond) at `25^(@)` C

C

Diamond will provide more heat on complete combustion at `25^(@)` C

D

`DeltaG_("transition")` of C (diamond) `to C` (graphite) is `-ve`.

Text Solution

Verified by Experts

The correct Answer is:
B, C, D

C(graphite) `to` C(O iam on d) `DeltaH = +ve`
i.e C ( graphite) is thermodynamically more stable
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    VMC MODULES ENGLISH|Exercise LEVEL-2|50 Videos
  • THERMODYNAMICS

    VMC MODULES ENGLISH|Exercise LEVEL-2 (NUMERICAL VALUE TYPE)|15 Videos
  • THERMODYNAMICS

    VMC MODULES ENGLISH|Exercise LEVEL-0 (LONG ANSWER TYPE (5 MARKS))|6 Videos
  • THERMOCHEMISTRY

    VMC MODULES ENGLISH|Exercise JEE ADVANCED (ARCHIVE)|31 Videos
  • THERMODYNAMICS & THERMOCHEMISTRY

    VMC MODULES ENGLISH|Exercise Impeccable|48 Videos

Similar Questions

Explore conceptually related problems

Assertion (A): Enthalpy of graphite is lower than that of diamond. Reason (R ) : Entropy of graphite is lower than that of diamond.

The average value of C-C bond order in graphite is

The enthalpy change for the process C("graphite") rarr C(g) is called

With respect to graphite and diamond, which of the statements given below are correct? (1) Graphite is harder than diamond. (2) Graphite has higher electrical conductivity than diamond. (3) Graphite has higher thermal conductivity than diamond. (4)Graphite has higher C-C bond order than diamond.

A : C_("diamond") rightarrow C_("graphite") Delta H and Delta U are same for this reaction. R: Entropy increases during the conversion of diamond to graphite.

The standard state Gibbs free energies of formation of ) C(graphite and C(diamond) at T = 298 K are Delta_(f)G^(@)["C(graphite")]=0kJ mol^(-1) Delta_(f)G^(@)["C(diamond")]=2.9kJ mol^(-1) The standard state means that the pressure should be 1 bar, and substance should be pure at a given temperature. The conversion of graphite [ ) C(graphite ] to diamond [C(diamond)] reduces its volume by 2xx10^(-6)m^(3) mol^(-1). If ) C(graphite is converted to C(diamond) isothermally at T = 298 K, the pressure at which ) C(graphite is in equilibrium with C(diamond), is ["Useful information:"1J=1kg m^(2)s^(-2),1Pa=1kgm^(-1)s^(-2),1"bar"=10^(5)Pa]

Why is C-C bond length in graphite shorter than in C-C bond length in diamond?

If the enthalpy change for the transition of liquid water to steam is 300kJ mol^(-1)" at "27^(@)C , the entropy change for the proces would be

If the enthalpy change for the transition of liquid water to steam is 30 kJ mol^(-1)" at " 27^@C the entropy change for the process would be

The enthalpy change when 1mol of graphite is converted into diamond is known as the enthalpy of………….

VMC MODULES ENGLISH-THERMODYNAMICS-LEVEL-1
  1. The enthalpy change for transition of liquid water to steam is 40.8 kJ...

    Text Solution

    |

  2. Which of the following statements is true?

    Text Solution

    |

  3. In a reversible process, the value of Delta S (sys) + Delta S(surr) is

    Text Solution

    |

  4. Consider the following cyclic process. I. Isothermal , II. Adiaba...

    Text Solution

    |

  5. The following diagram represents the (p-V) changes of gas. Thus, total...

    Text Solution

    |

  6. Which of the following proces is (are) expected to be spontaneous at h...

    Text Solution

    |

  7. Which of the plots of ln K vs (1/T) is/are correct?

    Text Solution

    |

  8. The value of DeltaH("transition") of C (graphite) rarr C (diamond) is ...

    Text Solution

    |

  9. Among the following , the state funcation (s) is (are)

    Text Solution

    |

  10. For an endothermic reaction, Delta H represents the enthalpy of the re...

    Text Solution

    |

  11. Match the following:

    Text Solution

    |

  12. Match the Column:

    Text Solution

    |

  13. For the gas phase reaction, PCl(5)(g) hArr PCl(3)(g) + Cl(2)(g) Wh...

    Text Solution

    |

  14. The Haber's process of production of ammonia involves the equilibrium:...

    Text Solution

    |

  15. If a gas, at constant temperature and pressure expands, then its

    Text Solution

    |

  16. Considering the reaction, C(s) + O(2)(g) to CO(2)(g) + 393.5 kJ th...

    Text Solution

    |

  17. Considering entropy (S) as a thermodynamic parameter, the criterion fo...

    Text Solution

    |

  18. Assuming DeltaH^(@) and S^(@) do not change with temperature. Calculat...

    Text Solution

    |

  19. For a phase change: H(2)O(l)hArrH(2)O(s) 0^(@)C, 1 bar

    Text Solution

    |

  20. For the process H(2)O(l) (1 "bar", 373 K) rarr H(2)O(g) (1"bar", 373 K...

    Text Solution

    |