First, free energy data As in the system at 298 K, only S Θ , H 2 S(aq), HS - (aq), S 2 - (aq), SO 4 2 - (aq) and HSO 4 - are thermodynamically stable. The components. The free energy data required to plot the system is listed in the table below. Table 1 Free energy of each substance in S-H 2 O system 423K substance S 2 - HS - H 2 S(aq) SO 4 2 - HSO 4 - H 2 O(I) H + H 2 O 2 △G 423 Θ ∕kJ -4.60 10.23 -48.9 -736.9 -770.6 -247.63 -3.20 -17.01 -26.45 Second, the equilibrium equation Similar to the previous ones, the equilibrium equations involved here are numbered separately and correspond to the numbers marked on the corresponding balance lines on the dominant area map, but here is the full battery equation. Third, the analysis of the advantage zone map The dominant region at 423K is shown in Figure 1 with various sulfur-containing substances and H 2 S(aq) activity of 10 -1 mol∕L. Compared with 298K, there are two points worth noting. First, HSO 4 at higher temperatures - the predominant higher pH region extending direction - than the SO 4 2. Second, the stable zone of 423K elemental sulfur is much smaller than at 298K. The equilibrium formula (f) representing the boundary between HS - and S is not important even at 10 -1 mol ∕L at 298 K, but the advantage of sulfur at higher temperatures and lower sulfur-containing activity. The zone is determined by the equilibrium formula (c): HSO 4 - -S, equilibrium formula (d): SO 4 2 - -S and equilibrium formula (e): H 2 S(aq)-S. At a certain temperature, as the activity of HSO 4 - or SO 4 2 - decreases, the equilibrium E value falls to a lower value. However, as the H 2 S(aq) activity decreases, the equilibrium E value increases. At a certain temperature and activity of a group of dissolved materials, the elemental sulfur is thermodynamically unstable when the H 2 S(aq)-S line rises above the SO 4 2 - or HSO 4 - line. The ratio of HSO 4 - to SO 4 2 - is limited by the pH of the solution, and the activity of total sulfate and H 2 S (aq) can be independently regulated. Figure 1 S-H 2 O dominant area map (423K, S and H 2 O activity is 10 -1 ) China Empty Nail Polish Bottles,Gel Bottle Nail Polish supplier & manufacturer, offer low price, high quality Mini Nail Polish Bottles,Nail Polish Square Bottle, etc.Wide Usage--These clear glass bottles are perfect for storing nail polish, acetone, paint or other laboratory liquids. Good for DIY your own color and style and also good for repackaging nail polish and some of the liquid, etc. Cute size is easily to carry, they're nice for travel and touch-ups on the go Empty Nail Polish Bottles,Gel Bottle Nail Polish,Mini Nail Polish Bottles,Nail Polish Square Bottle NINGBO SUNWINJER DAILY PRODUCTS CO.,LTD , https://www.nblux-packing.com
In view of the sulfide from at S 2 - the C p Θ and S Θ now uncertain, but it does not appear on the advantages of 298K zone map. This ion is not considered here. 
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