Question
Asked Nov 18, 2019
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A reaction has ΔH∘rxn= -134 kJ and ΔS∘rxn= 320 J/K. 

At what temperature is the change in entropy for the reaction equal to the change in entropy for the surroundings?

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Expert Answer

Step 1

Given: -

ΔH°rxn = -134 KJ

ΔS°rxn = 320 J/K

If everything is carried out at a constant temperature and reversibly, the change in entropy of the surroundings is given by –

AS
surr
т.
where, AS
= thermal energy added to the surroundings by the system
temperature of the surroundings
suT
Т.
Sur
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AS surr т. where, AS = thermal energy added to the surroundings by the system temperature of the surroundings suT Т. Sur

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Step 2

The thermal energy transferred to the surroundings is ...

- - ΔΗ,
suT
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- - ΔΗ, suT

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