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【简答题】
（l）铝与某些金属氧化物在高温下的反应称为铝热反应，可用于冶炼高熔点金属。 已知：4Al（s）＋3O 2 （g）=2Al 2 O 3 （s） ＝-2830kJ·mol -1 =+230kJ·mol -1 =-390kJ·mol -1 铝与氧化铁发生铝热反应的热化学方程式是 。 （2）如下图所示，各容器中海水，其中被腐蚀时由快到慢的顺序是 ； ②装置中Cu电极上的电极反应式为 。 （3）钒（V）及其化合物广泛应用于新能源领域。液流储能电池是利用不同价态离子对的氧化还原反应来实现化学能和电能相互转化的装置，其原理如图所示。 ①当左槽溶液逐渐由黄变蓝，其电极反应式为 。 ②充电过程中，右槽溶液颜色逐渐由 色变为 色。
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