Home
Class 11
CHEMISTRY
For the reaction, 2A(g)+B(g) rarr 2D(g...

For the reaction,
`2A(g)+B(g) rarr 2D(g)`
`DeltaU^(Θ)=-10.5 kJ` and `DeltaS^(Θ)=-44.1 JK^(-1)`
Calculate `DeltaG^(Θ)` for the reaction, and predict whether the reaction may occur spontaneously.

Text Solution

Verified by Experts

For the given reaction, `Deltan_(G) = 2 - 3 = -1`
`DeltaH^(@) =DeltaU^(@) + Deltan_(g)RT`
`= -10.5 kJ + (-1) xx (8.314 xx 10^(-3)kJ) xx (298 K)`
` = - 10.5 - 2.48 = -12.98 kJ`
`DeltaG^(@) = DeltaH^(@) -TDeltaS^(@)`
` = - 12.98 -298(-44.10 xx 10^(-3)kJ)`
` = - 12.98 + 13.14 = 0.16 kJ`
Since `DeltaG^(@)` is +ve, the reaction is non-spontaneous.
Promotional Banner

Topper's Solved these Questions

  • THERMODYNAMICS

    MODERN PUBLICATION|Exercise NCERT Exemplar Problems (MCQ (Type - I))|14 Videos

  • THERMODYNAMICS

    MODERN PUBLICATION|Exercise NCERT Exemplar Problems (MCQ (Type - II))|5 Videos

  • THERMODYNAMICS

    MODERN PUBLICATION|Exercise Conceptual Questions - 3|18 Videos

  • STRUCTURE OF ATOM

    MODERN PUBLICATION|Exercise Unit Practice Test|13 Videos

Similar Questions

Explore conceptually related problems

For reaction, 2K_((g))+L_((g))rarr2M_((g)),DeltaU^(@)=-"10.5 KJ and "DeltaS^(@)=-"44.1 J K"^(-1) . Calculate DeltaG^(@) for the reaction and predict whether the reaction will be spontaneous or non-spontaneous?

For the reaction, 2A (s) + 2B (g)to C (g) + D(s) at 298K Delta U ^(@) =-10.5KJ and Delta S ^(@)=-44.10 JK^(-1) Calculate Delta G ^(@) for the reaction (in Joules).

For the reaction at 300K (take R=8JK^-1mole^-1 2A(g)+B(s)rarr2D(g) , Delta U^(0)=-10kJ and Delta S^(0)=-50JK^-1 . Find the value of Delta G^(0)

If for a reaction A(s) rarr 2B(g), deltaU+ 1.2 kcal and deltaS=40 cal K^(-1) at 400K then deltaG for the reaction will be ( R=2 cal mol^(-1)K^(-1) )

For a hypothetical reaction A(g) + 3B(g) to 2C(g). Delta H = -100 kJ and Delta S = -200 Jk^(-1) . Then the temperature at which the reaction will be in equilibrium is

For the reaction at 25^(@)C NH_(3(g))rarr(1)/(2)N_(2(g))+(3)/(2)H_(2(g)),DeltaH^(@)=11.04K calculate DeltaU^(@) of the reaction at the given temperature