For a chemical reaction A + B = C + D ( Δ _ r H ^ Θ = 80kJ mol ^ - 1 ) the entropy change Δ _ r S ^ Θ depends on the temperature T (in K ) as Δ _ r S ^ Θ = 2T( JK ^ - 1 mol ^ - 1 ) . Minimum temperature at which it will

Correct answer: 200 Δ G ° = Δ H ° - T × Δ S ° Δ G ° = Δ H ° - T × (2T) T = 200K

JEE Main 202126 FebruaryMorning Shift

JEE Main 2021 · 26 February · Morning Shift · Chemistry · Thermodynamics (C)

For a chemical reaction A + B = C + D ( Δ _ r H ^ Θ = 80kJ mol ^ -...

For a chemical reaction

A + B = C + D

\left({\Delta}_{r}{H}^{Θ} = 80kJ{mol}^{- 1}\right)

the entropy change{\Delta}_{r}{S}^{Θ}

depends on the temperature

T

(in

K

)

as {\Delta}_{r}{S}^{Θ} = 2T\left({JK}^{- 1}{mol}^{- 1}\right)

. Minimum temperature at which it will become spontaneous is

K

. (Integer)

200

$\Delta G ° = \Delta H ° - T \times \Delta S °$

$\Delta G ° = \Delta H ° - T \times \left(2T\right)$

$T = 200K$