②3Fe2O3(s)+CO(g)═2Fe3O4(s)+CO2(g)△H2=-50.75kJmol-1③Fe3O4(s)+CO(g)═3FeO(s)+CO2(g) △H3=-36.5kJmol-1 则反应FeO(s)+CO(g)═Fe(s)+CO2(g)的焓变为() A.+7.28 kJmol-1B.-7.28 kJmol-1
哈喽大家好~今天学姐带大家盘点一下高中化学选修的知识点。反应热的计算是中学化学中的一个重点知识,也是高考的一个热点。其中,利用盖斯定律进行反应热计算是重点和难点。
莎士比亚 《罗密欧与茱丽叶》A sad thing in life is when you meet someone who means a lot to you,only to find out in the end that it was never meant to be and you just have to let go. 生命中令人悲伤的一件事是你遇到了一个对你来说很重要的人,但却最终发现你们有缘无份,因此你不得不放手。
These violent delights have violent ends And in their triumph die, like fire and powder, Which, as they kiss, consume. 这种狂暴的快乐往往预示着狂暴的结局 在那欢愉的刹那,就像火和炸药 一吻即逝。莎士比亚 《罗密欧与朱丽叶》No man or woman is worth your tears, and the one who is, won’t make you cry.