Question

Given $\Delta G=\Delta H-T\Delta S$, how is the spontaneity of an endothermic reaction is affected by decreasing the $T$?

• A. Becomes less spontaneous
• B. Becomes more spontaneous
• C. Does not change
• D. Decreases at first but then increases
• E. Insufficient information to make a conclusion

Answer 1

The correct option is E Insufficient information to make a conclusion

$△G=△H-T△S$

Since, it is an endothermic reaction, so $△H$= positive and temperature is decreasing so $T△S$ would decrease. But some information would be required about $△S$ to decide whether $△H>T△S$ Or $T△S>△H$

Because, it will then decide the sign on $△G$, which will in turn determine its spontaneity.