Verified Solution • 2025–26 Session moderate

QJEEM23Ch17f3: JEE Main 2023 Chemistry - Class 11 JEEM23Ch17f3 Solution: For independent process at 300 K .tg…

For independent process at 300 K

Process ΔH/kJ mol−1\mathrm{\Delta H/kJ~mol^{-1}} ΔS/J K−1\mathrm{\Delta S/J~K^{-1}}
A −25-25 −80-80
B −22-22 40
C 25 −50-50
D 22 20

The number of non-spontaneous process from the following is __________

Step-by-Step Verified Solution

amp;ΔG=ΔH−TΔSamp;A:ΔG(Jmol−1)=−25×103+80×300:−veamp;B:ΔG(Jmol−1)=−22×103−40×300:−veamp;C:ΔG(Jmol−1)=25×103+300×50:+veamp;D:ΔG(Jmol−1)=22×103−20×300:+ve\begin{aligned}& \Delta \mathrm{G}=\Delta \mathrm{H}-\mathrm{T} \Delta \mathrm{S} \\\\& \mathrm{A}: \Delta \mathrm{G}\left(\mathrm{J} \mathrm{mol}^{-1}\right)=-25 \times 10^3+80 \times 300:-\mathrm{ve} \\\\& \mathrm{B}: \Delta \mathrm{G}\left(\mathrm{J} \mathrm{mol}^{-1}\right)=-22 \times 10^3-40 \times 300:-\mathrm{ve} \\\\& \mathrm{C}: \Delta \mathrm{G}\left(\mathrm{J} \mathrm{mol}^{-1}\right)=25 \times 10^3+300 \times 50:+\mathrm{ve} \\\\& \mathrm{D}: \Delta \mathrm{G}\left(\mathrm{J} \mathrm{mol}^{-1}\right)=22 \times 10^3-20 \times 300:+\mathrm{ve}\end{aligned}

Processes C\mathrm{C} and D\mathrm{D} are non-spontaneous.

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