Question

Wall LU ICVICW SUHL llalla 10 UNPLUI 2. MATHEMATICAL Consider the reaction A B + C, where AG = 0.00. (a) What is the value of AG (not AG”) when the initial concentra- tions of A, B, and Care 1 M, 10-3 M, and 10-6 M? (b) Try the same calculations for the reaction D + E= F, for the same relative order of concentrations. (c) Try the same calculations for the reaction G =H, if the con- centrations are 1 Mand 10" M for G and H, respectively.

Answer 1

of AG AG & RT in Tohi Co- 1(M) where si concentration of ith species. Vi stoichiometric coefficient of the species (the coefficients the reactants are taken as ave) The reaction in , ANBtc. AG 0.00 Vi l we just divide by So, AG & RT ln Ti (a ) co to make the quantity Linside le unitless giren CALM Word CB. 20² Vool ca ceo solm Ve o s. R. 8.314 5.maik Say To room temperature - 298K. Jomol AG. m AG, 19822-3143 m (5636395 5.moi! 298* 8-314 r3m Neo-1 Jomoll * -51.343 KJ. mol i) The reaction is D+EFF. Here CoolM voor1 CE 10M Cf 200M Ufal. AG 298 x 8.3 24 x in ~ - 17.124 kJ. mol wi) The reaction is GFH Here C CG. IM VG-1 CA. 10M VH 1. So, G. 298*8.324x m (1/) (h a - 17.12A KJ. mol J. mol

14 Citrate isocitrate. AG + 6.64 kJ. mel a + 1.59 Keal, mol isocitrate – a-ketogluterate AG = -267 KJ. moi = - 63.9 rosome real molt Hence a citrate - x-ketogluterate. The AG° is [since ag is slate function, The total change in free energy 2 -267 + 6.64 kJ. mol would be equal to the added ap free energies of the much 2 - 260-36 KJ mot intermediate steps, as long as the initial 2 +1.59-63.9 Keal mot & the final species are same 2- 62.31 kecal mol The reaction is an exorgonic, since ab a-ve, AG AGO+AG