Home
Class 12
CHEMISTRY
If DeltaH for a reaction has a positive ...

If `DeltaH` for a reaction has a positive value, how would you know the sign requirement of `DeltaS` for it so that the reaction is spontaneous?

Text Solution

Verified by Experts

The correct Answer is:
`DeltaG=DeltaH-TDeltaS`
For spontaneous reaction `DeltaG=(-)ve" "therefore DeltaS` should be positive
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THERMODYNAMICS

    RESONANCE|Exercise exercise-3 Part-3 :(Subjective questions)Section B|8 Videos

  • THERMODYNAMICS

    RESONANCE|Exercise exercise-3 Part-3 :(Subjective questions)Section C|6 Videos

  • THERMODYNAMICS

    RESONANCE|Exercise exercise-3 Part-3 :(Subjective questions)|6 Videos

  • TEST SERIES

    RESONANCE|Exercise CHEMISTRY|50 Videos

Similar Questions

Explore conceptually related problems

What is the sign of Delta G^(ө) for spontaneous reaction?

When DeltaH gt 0 and DeltaS lt 0 , reaction is never spontaneous. Explain .

Knowledge Check

  • DeltaH gt DeltaE for the reaction

    A
    `CH_(4)(g)+2O_(2)(g) rarr CO_(2)(g) +2H_(2)O(g)`
    B
    `N_(2)(g)+3H_(2)(g) rarr 2NH_(3) (g)`
    C
    `C_(2)H_(4)(g) +3O_(2)(g) rarr 2CO_(2)(g) +2H_(2)O(g)`
    D
    `CaCO_(3)(s) rarr CaO(s) +CO_(2)(g)`

  • in the reaction, DeltaH and DeltaS both are more than zero then in which of the following cases the reaction would be spontaneous

    A
    `DeltaHgtTDeltaS`
    B
    `TDeltaSgtDeltaH`
    C
    `DeltaH=TDeltaS`
    D
    `DeltaGgt0`

  • What are the sign of DeltaH and DeltaS for a reaction that is spontaneous only at low temperatures?

    A
    `DeltaH` is positve, `DeltaS` is positive
    B
    `DeltaH` is positve, `DeltaS` is negative
    C
    `DeltaH` is negative, `DeltaS` is negative
    D
    `DeltaH` is negative, `DeltaS` is positive

    • Similar Questions

    Explore conceptually related problems

    Write the conditions in terms of DeltaH and DeltaS when a reaction would be always spontaneous.

    For a given reaction Delta G obtained was having positive sign convention. State whether the reaction was spontaneous or non-spontaneous.

    In a reaction , DeltaH and DeltaS both are more than zeron. In which of the following cases would the reaction be spontaneous ?

    The value of DeltaH and DeltaS for a reaction are respectively 30 kJ mol^(-1) and 100JK^(-1)mol^(-1) . Then temperature above which the reaction will become spontaneous is:

    Which reaction has a positive DeltaS_(reaction)^(@)?

    Home
    Profile