Question

A chemical engineer is studying the two reactions shown in the table below. ta constant temperature of 33.0 °C and constant total pressure. Then, In each case, he fills a reaction vessel with some mixture of the reactants and products he measures the reaction enthalpy AH and reaction entropy AS of the first reaction, and the reaction enthalpy AH and reaction free energy AG of the second reaction. The results of his measurements are shown in the table. Complete the table. That is, calculate AG for the first reaction and AS for the second. (Round your answer to zero decimal places.) Then, decide whether, under the conditions the engineer has set up, the reaction because the system is at equilibrium. spontaneous, the reverse reaction is spontaneous, or neither forward nor reverse reaction is spontaneous -140, kJ АН 3 J 457 K AS = AG kJ Mgo () + 211C1 (s) — MgCl, (») + П,о(0 Which is spontaneous? this reaction the reverse reaction neither - 1207, kJ AH AS = AG 13. kJ P(g)6Cl, (8) »4PCI (g) Which is spontaneous? this reaction the reverse reaction nelther

Answer 1

lemperature, T: 33°e-(33t+ 273) K=306K Mgo(s) 2H() Mgch () to() 4H -146 KJ 140 XloT -457 4K AS 40x10306x (-457) S 4H-T4S -158 J -0.158 KJ O KJ Spontaneous: meithur 4pd, 0) 4Hz1a07 KJ = -1207 XL0 -13xlo3 J 46 -13 KJ 4 1H-T4S -1a07xlo 13xl0 4SH-46) /k 306 - 390 /K 3982 J/k Sineo, AG0 This eaetion is SpIntanecs.