板上好像都没有人讨论耶QQ 有几个问题想请教一下各位 1. (d)According to the statement in (c), the first electron affinity for sulfur is exothermic, but the second is endothermic. Give the explanation. 想请问造成电子亲和力由放热变吸热的原因是什麽? 有试着想用电子组态去解释 但好像兜不出个答案来... 另外想请问同样是1.的(b)小题,将大小次序排出来後 却不知道是越负的值表示晶格能越大 还是负越少的代表越大 像题目给的值是-1850最大还是-3119最大? 3.The cyanate ion (OCN-) and the fulminate ion (CNO-) have the same chemical formulas but have vastly diffrernt properties. Metal salts of one of these ions are commonly used as an explosive. (b) Which ion is likely to be explosive? Explain. 想请问最不稳的是用bond order去看吗? 负的bond order要在电负度大的原上子? 4.Given the following equation: 4NH3(g)+ 7O2(g)→ 4NO2(g)+ 6H2O(g) deltaH=-1130 kJ/mol (a) For the forward direction, do you think the entropy change of the system is positive, zero or negative? How about the entropy change of the surrounding? Explain your answers. 第一小题用系数判断选了negative 第二小题不晓得可不可以用系统放热表示环境吸热 所以deltaS环境是大於零? 以上麻烦帮忙解惑>"< 感谢各位 --

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