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Thermodynamics and Thermochemistry

Spontanious process or spontaneity

For a particular reversible reaction, at temperature T, H and

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Solving time: 3 mins

For a particular reversible reaction, at temperature $T, Δ H$ and $Δ S$ were found to be both +ve. If $T_{e}$ is the temperature at equilibrium, the reaction would be spontaneous when

T_{e} > T

T > T_{e}

T_{e}

is 5 times

T

T = T_{e}

Views: 6,285 students

Updated on: Mar 14, 2023

Book:

Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

Exam:

JEE Mains 2010

Found 4 tutors discussing this question

Noah Discussed

For a particular reversible reaction, at temperature

T, Δ H

and

Δ S

were found to be both +ve. If

T_{e}

is the temperature at equilibrium, the reaction would be spontaneous when

5 mins ago

Discuss this question LIVE

5 mins ago

Text solutionVerified

Δ G = Δ H - T Δ S

Here,

Δ G =

Gibb's free energy

Δ H =

Enthalpy change

Δ S =

Entropy change

T =

Temperature As equilibrium,

Δ G = 0

. Thus,

T Δ S = Δ H

, as

Δ H

and

Δ S

are +ve, for a reaction to be feasible (spontaneous),

Δ G

should be -ve. This can be possible only when

T Δ S > T_{e} Δ H

i.e.,

T Δ S > T_{e} Δ S

T > T_{e} [T_{e} =

temperature at equilibrium]

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Question Text	For a particular reversible reaction, at temperature $T, Δ H$ and $Δ S$ were found to be both +ve. If $T_{e}$ is the temperature at equilibrium, the reaction would be spontaneous when
Updated On	Mar 14, 2023
Topic	Thermodynamics and Thermochemistry
Subject	Chemistry
Class	Class 11
Answer Type	Text solution:1 Video solution: 3
Upvotes	389
Avg. Video Duration	11 min

For a particular reversible reaction, at temperature $T, Δ H$ and $Δ S$ were found to be both +ve. If $T_{e}$ is the temperature at equilibrium, the reaction would be spontaneous when

Text solutionVerified

Filo tutor solutions (3)

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For a particular reversible reaction, at temperature T,ΔH and ΔS were found to be both +ve. If Te​ is the temperature at equilibrium, the reaction would be spontaneous when

Text solutionVerified

Filo tutor solutions (3)

Questions from JEE Mains 2010 - PYQs

Practice questions from Arihant Chemistry JEE Main Chapterwise Solutions (2019-2002) (Arihant)

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For a particular reversible reaction, at temperature $T, Δ H$ and $Δ S$ were found to be both +ve. If $T_{e}$ is the temperature at equilibrium, the reaction would be spontaneous when