2.根據二氧化碳之P−V−T圖，如圖(一)，下列敘述何者正確？ (A)二氧化碳在35.5℃時較在48.1℃時符合波義耳定律(B)因為35.5℃時P−V曲線開始出現反曲現象，所以35.5℃稱為臨界溫度(C)在21.5℃時，e點與f點之間為氣－液二相共存區(D)對純物質而言，臨界狀態取決於溫度之高低

12.a下列反應式均列有該反應之\(\Delta H_{298}^0(J)\)及\(\Delta S_{298}^0 (\text{J K}^{-1})\)值，試問何種反應在任何溫度下都不可能進行自發反應？(A)\(\text{H}_2(\text{g})+\text{Cl}_2(\text{g}) \rightarrow 2\text{HCl}[\Delta H_{298}^0 = -185, \Delta S_{298}^0 = 141]\)(B)\( \text{NH}_4\text{Cl(s)} \rightarrow \text{NH}_3\text{(g)} + \text{HCl(g)} [\Delta H_{298}^0 = 176, \Delta S_{298}^0 = 284] \)(C)\(2\text{SO}_2(\text{g}) + \text{O}_2(\text{g}) \rightarrow 2\text{SO}_3(\text{g}) [\Delta H_{298}^0 = -198, \Delta S_{298}^0 = 187]\)(D)\(3\text{O}_2(\text{g}) \rightarrow 2\text{O}_3(\text{g}) [\Delta H_{298}^0 = 286, \Delta S_{298}^0 = -137]\)

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