Verified Solution • 2025–26 Session
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QJEEM21Ch1236: JEE Main 2021 Chemistry - Class 11 JEEM21Ch1236 Solution: For a chemical reaction A + B ⇌ C + D ( = 80 kJ mol 1 ) the…
For a chemical reaction A + B ⇌ C + D
( = 80 kJ mol 1) the entropy change depends on the temperature T (in K) as = 2T (J K 1mol 1).
Minimum temperature at which it will become spontaneous is ___________ K. (Integer)
( = 80 kJ mol 1) the entropy change depends on the temperature T (in K) as = 2T (J K 1mol 1).
Minimum temperature at which it will become spontaneous is ___________ K. (Integer)
Step-by-Step Verified Solution
We know,
For a reaction to be spontaneous
\Delta G^\circ < 0
\Delta H^\circ - T\Delta S^\circ < 0
T > {{\Delta H^\circ } \over {\Delta S^\circ }}
T > {{80000} \over {2T}}
2T2 > 80000
T2 > 40000
T > 200
The minimum temperature to make it spontaneous is 200 K.
For a reaction to be spontaneous
\Delta G^\circ < 0
\Delta H^\circ - T\Delta S^\circ < 0
T > {{\Delta H^\circ } \over {\Delta S^\circ }}
T > {{80000} \over {2T}}
2T2 > 80000
T2 > 40000
T > 200
The minimum temperature to make it spontaneous is 200 K.