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By using relation \(∆\mathrm{G}=∆\mathrm{H}-\mathrm{T}∆\mathrm{S}\) Which of the following is incorrect for spontaneous …

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By using relation
\(∆\mathrm{G}=∆\mathrm{H}-\mathrm{T}∆\mathrm{S}\)

Which of the following is incorrect for spontaneous reaction at a given temperature?

(Memory Based JEE Mains 23/01/2025 ,Shift -2)

a

\(∆\mathrm{H}>0,∆\mathrm{S}>0\)

b

\(∆\mathrm{H}>0,∆\mathrm{S}<0\)

c

\(∆\mathrm{H}<0,∆\mathrm{S}>0\)

d

\(∆\mathrm{H}<0,∆\mathrm{S}<0\)

✓ Correct answer: b)

\(∆\mathrm{H}>0,∆\mathrm{S}<0\)

Explanation

If \(∆\mathrm{H}>0,∆\mathrm{S}>0\) then process is spontaneous at high temperature
If \(∆\mathrm{H}>0,∆\mathrm{S}<0\) process is always non spontaneous
If \(∆\mathrm{H}<0,∆\mathrm{S}>0\), then process is always spontaneous
If \(∆\mathrm{H}<0,∆\mathrm{S}<0\), then process is spontaneous at low temperature.

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