Question

3 attempts left Check my work Be sure to answer all parts. From the values of AH and AS, predict which of the following reactions would be spontaneous at 24°C: reaction A: AH = 10.5 kJ/mol, AS = 30.0 J/K mol: spontaneous nonspontaneous impossible to tell mol, reaction B: AH=1.8 kJ/mol, AS = -113 J/ K O spontaneous nonspontaneous impossible to tell If either of the reactions is nonspontaneous, can it(they) become spontaneous? yes, reaction A can become spontaneous yes, reaction B can become spontaneous yes, both reactions can become spontaneous no, neither reaction can become spontaneous If either of the reactions is nonspontaneous but can become spontaneous, at what temperature might it become spontaneous? oc

Answer 1

Ans? We know, AG = TH-TAS where so is free energy change For a reaction it AG <o , then the reaction is spontaneous 19 70, then the reaction is non-spontaneous Now, for reoretion A : 4H = 10.5kg/mol AS = 3000 J/k mot T = 24c = (273 +24) K. = 297k So, 09 = (10.5 xy malt) – (30.9 júl mof x 297 k) = 10.5 kymas - 8.91 ky mot 2 1.59 ky most nie G >0 so raction A in non-spontaneous Reaction B : TH= 18 kg/mayan AS 7 - 11307/k mot Ta 297K so, 48 = 1.8 ky most - (- 113) Kmail) & 297 € = 118 kg mot! + 33.56 kg moll = 60.41 kg mot ie 4G70, so the raction B is also non-spontaneous