For a dimerization reaction, 2 A ( g ) → A 2 ( g ) at 298 K , Δ U - = - 20 kJmol - 1 , Δ S - = - 30 JK - 1 mol - 1 ,then the ∣Δ G ∣ will be …..J.

From Δ H = Δ U + Δ ngRT Δ = − 20 × 1000 − 1 × 8 .314 J / m o l . K × 298 K = − 22477 .572 J . Δ G = Δ H − T Δ S = − 13537 .572 J = − 13538 J

Chemistry - Thermodynamics - II Question with Solution | TestHub

ChemistryThermodynamics - IIGibb's Free EnergyMedium2 minPYQ_2020

ChemistryMediuminteger

For a dimerization reaction,

$2 A (g) \to A_{2} (g)$

at $298 K, Δ U^{-} = - 20 {kJmol}^{- 1}, Δ S^{-} = - 30 {JK}^{- 1} {mol}^{- 1}$ ,then the $∣Δ G ∣$ will be …..J.

Answer:

13538

Solution:

From $Δ H = Δ U + Δ ngRT$

$Δ = - 20 \times 1000 - 1 \times 8 .314 J / m o l . K \times 298 K$

$= - 22477 .572 J$

. $Δ G = Δ H - T Δ S$

$= - 13537 .572 J$

$= - 13538 J$

Stream:JEESubject:ChemistryTopic:Thermodynamics - IISubtopic:Gibb's Free Energy

⏱ 2mℹ️ Source: PYQ_2020

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