12) He has lower entropy than CO2 gas which has lower entropy than gaseous Benzene?
1) why is it so that many endothermic reactions that are not spontaneous at room temperature become spontaneous at high temperature?
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4 Answers
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111) Actually in case of endothermic reaction the reaction need more heat to attain spontenity hence it becomes spontaneous at high temperature....
3)Compound with high heat of formation are less stable because H is high so increase of spontenity increases hence it becomes less stable...
1With increase in energy a compound becomes less stable. And with loss of energy in a reaction the product formed becomes more stable.
I would just give you an example because this is something one must necessarily understand. Take a stone and throw it upward as it reaches certain height why does it come back because it has undergone a change in potential energy. Whenever there is an increase in potential energy the stability decreases.
Thats why among Resonating structures the one with least energy is more stable. That is why bond formation is exothermic reaction. And thats why when we separate two unlike charges their potential energy increases.