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A + B rarr C+D, Delta H = -10,000 J mol^(-1) , Delta S = - 33.3 J mol^(-1) K^(-1) (i) At what temperature the reaction will occur spontaneously from leftto right ? (ii) At what temperature , the reaction will reverse?

Answer» <html><body><p></p>Solution :`<a href="https://interviewquestions.tuteehub.com/tag/delta-947703" style="font-weight:bold;" target="_blank" title="Click to know more about DELTA">DELTA</a> G = DeltaH -T DeltaS` <br/> At <a href="https://interviewquestions.tuteehub.com/tag/equilibrium-974342" style="font-weight:bold;" target="_blank" title="Click to know more about EQUILIBRIUM">EQUILIBRIUM</a> , `Delta G =0` so that `Delta H = T Delta S` or `T = (DeltaH)/(DeltaS) = (- 10000J mol^(-1))/( - 33.3JK^(-1)mol^(-1))= 300.3K` <br/>(i) For spontaneity from left to right, `Delta G` should be -ve for the <a href="https://interviewquestions.tuteehub.com/tag/given-473447" style="font-weight:bold;" target="_blank" title="Click to know more about GIVEN">GIVEN</a> <a href="https://interviewquestions.tuteehub.com/tag/reaction-22747" style="font-weight:bold;" target="_blank" title="Click to know more about REACTION">REACTION</a>. This willbe so if `T lt 300.3K` ( becasue `Delta H` and `Delta S` both are -ve ) <br/> (ii) For reverse reaction to occur, `Delta G` shouldbe `+` be for forward reaction. This will be so if `Tgt300.3` <a href="https://interviewquestions.tuteehub.com/tag/k-527196" style="font-weight:bold;" target="_blank" title="Click to know more about K">K</a>.</body></html>


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